Причина ошибки access after eof

Ошибки¶

Приложения, работающие на Node.js, обычно сталкиваются с четырьмя категориями ошибок:

  • Стандартные ошибки JavaScript, такие как {EvalError}, {SyntaxError}, {RangeError}, {ReferenceError}, {TypeError} и {URIError}.
  • Системные ошибки, вызванные ограничениями базовой операционной системы, например, попытка открыть несуществующий файл или попытка отправить данные через закрытый сокет.
  • Пользовательские ошибки, вызванные кодом приложения.
  • AssertionError — это специальный класс ошибок, которые могут быть вызваны, когда Node.js обнаруживает исключительное нарушение логики, которое никогда не должно происходить. Обычно их вызывает модуль node:assert.

Все JavaScript и системные ошибки, вызываемые Node.js, наследуются от или являются экземплярами стандартного класса JavaScript {Error} и гарантированно предоставляют по крайней мере свойства, доступные для этого класса.

Распространение и перехват ошибок¶

Node.js поддерживает несколько механизмов для распространения и обработки ошибок, возникающих во время работы приложения. То, как эти ошибки сообщаются и обрабатываются, полностью зависит от типа Error и стиля вызываемого API.

Все ошибки JavaScript обрабатываются как исключения, которые немедленно генерируют и выбрасывают ошибку, используя стандартный механизм JavaScript throw. Они обрабатываются с помощью конструкции try...catch, предоставляемой языком JavaScript.

// Выброс с ошибкой ReferenceError, потому что z не определен.
try {
  const m = 1;
  const n = m + z;
} catch (err) {
  // Обрабатываем ошибку здесь.
}

Любое использование механизма JavaScript throw вызовет исключение, которое должно быть обработано с помощью try...catch, иначе процесс Node.js немедленно завершится.

За редким исключением, синхронные API (любой блокирующий метод, который не принимает функцию callback, например, fs.readFileSync), будут использовать throw для сообщения об ошибках.

Ошибки, возникающие в асинхронных API, могут сообщаться различными способами:

  • Большинство асинхронных методов, которые принимают функцию callback, принимают объект Error, передаваемый в качестве первого аргумента этой функции. Если первый аргумент не является null и представляет собой экземпляр Error, то произошла ошибка, которую следует обработать.
const fs = require('node:fs');
fs.readFile(
  'файл, который не существует',
  (err, data) => {
    if (err) {
      console.error(
        'Произошла ошибка при чтении файла!',
        err
      );
      return;
    }
    // Иначе обрабатываем данные
  }
);
  • Когда асинхронный метод вызывается на объекте, который является EventEmitter, ошибки могут быть направлены в событие 'error' этого объекта.
const net = require('node:net');
const connection = net.connect('localhost');

// Добавление обработчика события 'error' к потоку:
connection.on('error', (err) => {
  // Если соединение сбрасывается сервером, или если не удается
  // соединиться вообще, или при любой ошибке, с которой столкнулось
  // соединением, ошибка будет отправлена сюда.
  console.error(err);
});

connection.pipe(process.stdout);
  • Несколько типично асинхронных методов в API Node.js все еще могут использовать механизм throw для создания исключений, которые должны обрабатываться с помощью try...catch. Полного списка таких методов нет; пожалуйста, обратитесь к документации каждого метода для определения требуемого механизма обработки ошибок.

Использование механизма событий error наиболее характерно для API stream-based и event emitter-based, которые сами по себе представляют серию асинхронных операций во времени (в отличие от одной операции, которая может пройти или не пройти).

const EventEmitter = require('node:events');
const ee = new EventEmitter();

setImmediate(() => {
  // This will crash the process because no 'error' event
  // handler has been added.
  ee.emit('error', new Error('This will crash'));
});

Ошибки, сгенерированные таким образом, не могут быть перехвачены с помощью try...catch, поскольку они возникают после того, как вызывающий код уже завершился.

Разработчики должны обратиться к документации для каждого метода, чтобы определить, как именно распространяются ошибки, вызванные этими методами.

Обратные вызовы по ошибке¶

Большинство асинхронных методов, представленных в API ядра Node.js, следуют идиоматическому шаблону, называемому первым обратным вызовом при ошибке. В этом шаблоне функция обратного вызова передается методу в качестве аргумента. Когда операция либо завершается, либо возникает ошибка, вызывается функция обратного вызова с объектом Error (если таковой имеется), переданным в качестве первого аргумента. Если ошибка не была обнаружена, первый аргумент будет передан как null.

const fs = require('node:fs');

function errorFirstCallback(err, data) {
  if (err) {
    console.error('Произошла ошибка', err);
    return;
  }
  console.log(data);
}

fs.readFile(
  '/some/file/that/does-not-exist',
  errorFirstCallback
);
fs.readFile(
  '/some/file/that/does-exist',
  errorFirstCallback
);

Механизм JavaScript try...catch нельзя использовать для перехвата ошибок, генерируемых асинхронными API. Частой ошибкой новичков является попытка использовать throw внутри обратного вызова error-first:

// THIS WILL NOT WORK:
const fs = require('node:fs');

try {
  fs.readFile(
    '/some/file/that/does-not-exist',
    (err, data) => {
      // Mistaken assumption: throwing here...
      if (err) {
        throw err;
      }
    }
  );
} catch (err) {
  // This will not catch the throw!
  console.error(err);
}

Это не сработает, потому что функция обратного вызова, переданная в fs.readFile(), вызывается асинхронно. К тому моменту, когда callback будет вызван, окружающий код, включая блок try...catch, уже завершится. Выброс ошибки внутри обратного вызова может привести к краху процесса Node.js в большинстве случаев. Если включены domains, или обработчик был зарегистрирован в process.on('uncaughtException'), такие ошибки могут быть перехвачены.

Класс: Error

Общий объект JavaScript {Error}, который не обозначает никаких конкретных обстоятельств того, почему произошла ошибка. Объекты Error фиксируют «трассировку стека», детализирующую точку в коде, в которой Error был инстанцирован, и могут предоставлять текстовое описание ошибки.

Все ошибки, генерируемые Node.js, включая все системные ошибки и ошибки JavaScript, будут либо экземплярами класса Error, либо наследоваться от него.

### new Error(message[, options])

  • сообщение {строка}
  • options {Object}
  • cause {any} Ошибка, которая вызвала вновь созданную ошибку.

Создает новый объект Error и устанавливает свойство error.message в предоставленное текстовое сообщение. Если в качестве message передан объект, текстовое сообщение генерируется вызовом String(message). Если передана опция cause, она присваивается свойству error.cause. Свойство error.stack будет представлять точку в коде, в которой была вызвана new Error(). Трассировка стека зависит от V8’s stack trace API. Трассировка стека распространяется только на (a) начало синхронного выполнения кода, или (b) количество кадров, заданное свойством Error.stackTraceLimit, в зависимости от того, что меньше.

Error.captureStackTrace(targetObject[, constructorOpt])

  • targetObject {Object}
  • constructorOpt {Функция}

Создает свойство .stack на targetObject, которое при обращении к нему возвращает строку, представляющую место в коде, в котором была вызвана Error.captureStackTrace().

const myObject = {};
Error.captureStackTrace(myObject);
myObject.stack; // Аналогично `new Error().stack`.

Первая строка трассировки будет иметь префикс ${myObject.name}: ${myObject.message}.

Необязательный аргумент constructorOpt принимает функцию. Если он задан, все фреймы выше constructorOpt, включая constructorOpt, будут опущены в сгенерированной трассировке стека.

Аргумент constructorOpt полезен для сокрытия от пользователя деталей реализации генерации ошибок. Например:

function MyError() {
  Error.captureStackTrace(this, MyError);
}

// Без передачи MyError в captureStackTrace, MyError
// кадр будет отображаться в свойстве .stack. Передавая
// конструктору, мы опускаем этот кадр и сохраняем все кадры ниже него.
new MyError().stack;

Error.stackTraceLimit

  • {число}

Свойство Error.stackTraceLimit определяет количество кадров стека, собираемых трассировкой стека (независимо от того, генерируется ли она new Error().stack или Error.captureStackTrace(obj)).

Значение по умолчанию — 10, но может быть установлено в любое допустимое число JavaScript. Изменения будут влиять на любую трассировку стека, захваченную после изменения значения.

Если значение не равно числу или равно отрицательному числу, трассировка стека не будет фиксироваться.

error.cause

  • {любая}

Если присутствует, свойство error.cause является основной причиной Error. Оно используется, когда вы ловите ошибку и бросаете новую с другим сообщением или кодом, чтобы сохранить доступ к исходной ошибке.

Свойство error.cause обычно устанавливается вызовом new Error(message, { cause }). Оно не устанавливается конструктором, если не указан параметр cause.

Это свойство позволяет связывать ошибки в цепочку. При сериализации объектов Error, util.inspect() рекурсивно сериализует error.cause, если оно установлено.

const cause = new Error(
  'The remote HTTP server responded with a 500 status'
);
const symptom = new Error('The message failed to send', {
  cause,
});

console.log(symptom);
// Prints:
//   Error: The message failed to send
//       at REPL2:1:17
//       at Script.runInThisContext (node:vm:130:12)
//       ... 7 lines matching cause stack trace ...
//       at [_line] [as _line] (node:internal/readline/interface:886:18) {
//     [cause]: Error: The remote HTTP server responded with a 500 status
//         at REPL1:1:15
//         at Script.runInThisContext (node:vm:130:12)
//         at REPLServer.defaultEval (node:repl:574:29)
//         at bound (node:domain:426:15)
//         at REPLServer.runBound [as eval] (node:domain:437:12)
//         at REPLServer.onLine (node:repl:902:10)
//         at REPLServer.emit (node:events:549:35)
//         at REPLServer.emit (node:domain:482:12)
//         at [_onLine] [as _onLine] (node:internal/readline/interface:425:12)
//         at [_line] [as _line] (node:internal/readline/interface:886:18)

error.code

  • {string}

Свойство error.code — это строковая метка, которая идентифицирует вид ошибки. error.code является наиболее стабильным способом идентификации ошибки. Он будет меняться только между основными версиями Node.js. В отличие от этого, строки error.message могут изменяться между любыми версиями Node.js. Подробности о конкретных кодах см. в Node.js error codes.

error.message

  • {string}

Свойство error.message — это строковое описание ошибки, заданное вызовом new Error(message). Переданное конструктору message также появится в первой строке трассировки стека Error, однако изменение этого свойства после создания объекта Error может не изменить первую строку трассировки стека (например, если error.stack будет прочитан до изменения этого свойства).

const err = new Error('Сообщение');
console.error(err.message);
// Выводит: Сообщение

error.stack

  • {строка}

Свойство error.stack представляет собой строку, описывающую точку в коде, в которой Error была инстанцирована.

Error: Things keep happening!
   at /home/gbusey/file.js:525:2
   at Frobnicator.refrobulate (/home/gbusey/business-logic.js:424:21)
   at Actor.<anonymous> (/home/gbusey/actors.js:400:8)
   at increaseSynergy (/home/gbusey/actors.js:701:6)

Первая строка отформатирована как <имя класса ошибки>: <сообщение об ошибке>, а за ней следует серия стековых кадров (каждая строка начинается с «at»). Каждый кадр описывает место вызова в коде, которое привело к возникновению ошибки. V8 пытается отобразить имя для каждой функции (по имени переменной, имени функции или имени метода объекта), но иногда ему не удается найти подходящее имя. Если V8 не может определить имя функции, для этого кадра будет отображаться только информация о местоположении. В противном случае будет выведено определенное имя функции с информацией о местоположении, заключенной в круглые скобки.

Фреймы генерируются только для функций JavaScript. Если, например, выполнение синхронно проходит через функцию аддона C++ под названием cheetahify, которая сама вызывает функцию JavaScript, фрейм, представляющий вызов cheetahify, не будет присутствовать в стековых трассах:

const cheetahify = require('./native-binding.node');

function makeFaster() {
  // `cheetahify()` *synchronously* calls speedy.
  cheetahify(function speedy() {
    throw new Error('oh no!');
  });
}

makeFaster();
// will throw:
//   /home/gbusey/file.js:6
//       throw new Error('oh no!');
//           ^
//   Error: oh no!
//       at speedy (/home/gbusey/file.js:6:11)
//       at makeFaster (/home/gbusey/file.js:5:3)
//       at Object.<anonymous> (/home/gbusey/file.js:10:1)
//       at Module._compile (module.js:456:26)
//       at Object.Module._extensions..js (module.js:474:10)
//       at Module.load (module.js:356:32)
//       at Function.Module._load (module.js:312:12)
//       at Function.Module.runMain (module.js:497:10)
//       at startup (node.js:119:16)
//       at node.js:906:3

Информация о местоположении будет одной из:

  • native, если кадр представляет собой вызов внутри V8 (как в [].forEach).
  • plain-filename.js:line:column, если фрейм представляет собой вызов внутри Node.js.
  • /absolute/path/to/file.js:line:column, если фрейм представляет собой вызов в пользовательской программе (использующей систему модулей CommonJS), или ее зависимостях.
  • <transport-protocol>:///url/to/module/file.mjs:line:column, если кадр представляет собой вызов в пользовательской программе (с использованием системы модулей ES), или ее зависимостей.

Строка, представляющая трассировку стека, лениво генерируется при **обращении к свойству error.stack.

Количество кадров, захватываемых трассировкой стека, ограничено меньшим из значений Error.stackTraceLimit или количеством доступных кадров на текущем такте цикла событий.

Класс: AssertionError

  • Расширяет: {errors.Error}

Указывает на неудачу утверждения. Подробнее см. в Класс: assert.AssertionError.

Класс: RangeError

  • Расширяет: {errors.Error}

Указывает, что предоставленный аргумент не входит в набор или диапазон допустимых значений для функции; будь то числовой диапазон, или вне набора опций для данного параметра функции.

require('node:net').connect(-1);
// Выбрасывает "RangeError: параметр "port" должен быть >= 0 и < 65536: -1"

Node.js будет генерировать и бросать экземпляры RangeError немедленно в качестве формы проверки аргументов.

Класс: ReferenceError

  • Расширяет: {errors.Error}

Указывает на попытку доступа к переменной, которая не определена. Такие ошибки обычно указывают на опечатки в коде или на другие сбои в программе.

Хотя клиентский код может генерировать и распространять эти ошибки, на практике это делает только V8.

doesNotExist;
// Выбрасывает ошибку ReferenceError, doesNotExist не является переменной в этой программе.

Если только приложение не генерирует и не выполняет код динамически, случаи ReferenceError указывают на ошибку в коде или его зависимостях.

Класс: SyntaxError

  • Расширяет: {errors.Error}

Указывает, что программа не является валидным JavaScript. Эти ошибки могут генерироваться и распространяться только в результате оценки кода. Оценка кода может происходить в результате eval, Function, require или vm. Эти ошибки почти всегда свидетельствуют о неработающей программе.

try {
  require('node:vm').runInThisContext('binary ! isNotOk');
} catch (err) {
  // 'err' will be a SyntaxError.
}

Экземпляры SyntaxError не могут быть устранены в контексте, который их создал — они могут быть пойманы только другими контекстами.

Класс: SystemError

  • Расширяет: {errors.Error}

Node.js генерирует системные ошибки, когда в среде выполнения возникают исключения. Обычно они возникают, когда приложение нарушает ограничения операционной системы. Например, системная ошибка возникнет, если приложение попытается прочитать несуществующий файл.

  • address {строка} Если присутствует, адрес, с которым произошел сбой сетевого соединения.
  • code {string} Строковый код ошибки
  • dest {string} Если присутствует, назначение пути к файлу при сообщении об ошибке файловой системы
  • errno {number} Номер ошибки, предоставляемый системой
  • info {Object} Если присутствует, дополнительные сведения о состоянии ошибки
  • message {string} Предоставленное системой человекочитаемое описание ошибки
  • path {string} Если присутствует, путь к файлу при сообщении об ошибке файловой системы
  • port {number} Если присутствует, порт сетевого подключения, который недоступен
  • syscall {string} Имя системного вызова, вызвавшего ошибку

error.address

  • {строка}

Если присутствует, error.address — это строка, описывающая адрес, с которым не удалось установить сетевое соединение.

error.code

  • {строка}

Свойство error.code — это строка, представляющая код ошибки.

error.dest

  • {строка}

Если присутствует, то error.dest является местом назначения пути к файлу при сообщении об ошибке файловой системы.

error.errno

  • {number}

Свойство error.errno — это отрицательное число, которое соответствует коду ошибки, определенному в libuv Error handling.

В Windows номер ошибки, предоставляемый системой, будет нормализован libuv.

Чтобы получить строковое представление кода ошибки, используйте util.getSystemErrorName(error.errno).

error.info

  • {Object}

Если присутствует, error.info — это объект с подробной информацией о состоянии ошибки.

error.message

  • {string}

error.message — это предоставленное системой человекочитаемое описание ошибки.

error.path

  • {строка}

Если присутствует, error.path — это строка, содержащая соответствующее неверное имя пути.

error.port

  • {число}

Если присутствует, error.port — это порт сетевого подключения, который недоступен.

error.syscall

  • {строка}

Свойство error.syscall — это строка, описывающая syscall, который завершился неудачей.

Общие системные ошибки¶

Это список системных ошибок, часто встречающихся при написании программ на Node.js. Полный список см. на странице errno(3) man page.

  • EACCES (Разрешение отклонено): Была предпринята попытка получить доступ к файлу способом, запрещенным его разрешениями на доступ к файлу.

  • EADDRINUSE (Адрес уже используется): Попытка привязать сервер (net, http или https) к локальному адресу не удалась из-за того, что другой сервер в локальной системе уже занимает этот адрес.

  • ECONNREFUSED (Connection refused): Не удалось установить соединение, поскольку целевая машина активно отказывается от него. Обычно это происходит при попытке подключения к службе, которая неактивна на внешнем узле.

  • ECONNRESET (Connection reset by peer): Соединение было принудительно закрыто сверстником. Обычно это происходит в результате потери соединения на удаленном сокете из-за тайм-аута или перезагрузки. Часто встречается в модулях http и net.

  • EEXIST (Файл существует): Существующий файл был целью операции, которая требовала, чтобы цель не существовала.

  • EISDIR (Is a directory): Операция ожидала файл, но заданный путь оказался каталогом.

  • EMFILE (Слишком много открытых файлов в системе): Максимальное количество файловых дескрипторов, допустимое в системе, достигнуто, и запросы на другой дескриптор не могут быть выполнены, пока не будет закрыт хотя бы один. Это происходит при параллельном открытии большого количества файлов одновременно, особенно на системах (в частности, macOS), где существует низкий лимит файловых дескрипторов для процессов. Чтобы устранить низкий лимит, запустите ulimit -n 2048 в той же оболочке, в которой будет запущен процесс Node.js.

  • ENOENT (Нет такого файла или каталога): Обычно вызывается операциями fs, указывая на то, что компонент указанного пути не существует. По указанному пути не удалось найти ни одной сущности (файла или каталога).

  • ENOTDIR (Не каталог): Компонент указанного пути существует, но не является каталогом, как ожидалось. Обычно вызывается fs.readdir.

  • ENOTEMPTY (Каталог не пуст): Каталог с записями был целью операции, требующей пустого каталога, обычно fs.unlink.

  • ENOTFOUND (DNS-поиск не удался): Указывает на ошибку DNS либо EAI_NODATA, либо EAI_NONAME. Это не стандартная ошибка POSIX.

  • EPERM (Операция не разрешена): Была предпринята попытка выполнить операцию, требующую повышенных привилегий.

  • EPIPE (Сломанная труба): Запись в трубу, сокет или FIFO, для которой нет процесса для чтения данных. Обычно встречается на уровнях net и http, указывая на то, что удаленная сторона потока, на которую производится запись, была закрыта.

  • ETIMEDOUT (Операция завершилась): Запрос на подключение или отправку не прошел, потому что

Класс: TypeError

  • Расширяет {errors.Error}

Указывает, что предоставленный аргумент не является допустимым типом. Например, передача функции в параметр, который ожидает строку, будет TypeError.

require('node:url').parse(() => {});
// Выбросит TypeError, так как ожидается строка.

Node.js будет генерировать и бросать экземпляры TypeError немедленно в качестве формы проверки аргументов.

Исключения и ошибки¶

Исключение JavaScript — это значение, которое выбрасывается в результате некорректной операции или как цель оператора throw. Хотя не требуется, чтобы эти значения были экземплярами Error или классами, наследующими от Error, все исключения, выбрасываемые Node.js или временем выполнения JavaScript, будут экземплярами Error.

Некоторые исключения являются неустранимыми на уровне JavaScript. Такие исключения всегда приводят к аварийному завершению процесса Node.js. Примерами могут служить проверки assert() или вызовы abort() на уровне C++.

Ошибки OpenSSL¶

Ошибки, возникающие в crypto или tls, относятся к классу Error, и помимо стандартных свойств .code и .message могут иметь некоторые дополнительные свойства, специфичные для OpenSSL.

error.opensslErrorStack

Массив ошибок, который может дать представление о том, в каком месте библиотеки OpenSSL возникла ошибка.

error.function

Функция OpenSSL, в которой возникла ошибка.

error.library

Библиотека OpenSSL, в которой возникла ошибка.

error.reason

Человекочитаемая строка, описывающая причину ошибки.

Node.js error codes¶

ABORT_ERR

Используется, когда операция была прервана (обычно с помощью AbortController).

API, не использующие AbortSignal, обычно не выдают ошибку с этим кодом.

Этот код не использует обычное соглашение ERR_*, которое используется в ошибках Node.js, чтобы быть совместимым с AbortError веб-платформы.

ERR_ACCESS_DENIED

Специальный тип ошибки, возникающий всякий раз, когда Node.js пытается получить доступ к ресурсу, ограниченному Permission Model.

ERR_AMBIGUOUS_ARGUMENT

Аргумент функции используется таким образом, что подпись функции может быть неправильно понята. Модуль node:assert выбрасывает это сообщение, когда параметр message в assert.throws(block, message) совпадает с сообщением об ошибке, выброшенным block, поскольку такое использование предполагает, что пользователь считает message ожидаемым сообщением, а не сообщением, которое отобразит AssertionError, если block не выбросит сообщение.

ERR_ARG_NOT_ITERABLE

Аргумент iterable (т.е. значение, которое работает с циклами for...of) был необходим, но не предоставлялся API Node.js.

ERR_ASSERTION

Специальный тип ошибки, который может быть вызван всякий раз, когда Node.js обнаруживает исключительное нарушение логики, которое никогда не должно происходить. Обычно их вызывает модуль node:assert.

ERR_ASYNC_CALLBACK

Была предпринята попытка зарегистрировать что-то, что не является функцией, в качестве обратного вызова AsyncHooks.

ERR_ASYNC_TYPE

Тип асинхронного ресурса был неверным. Пользователи также могут определять свои собственные типы при использовании общедоступного API embedder.

ERR_BROTLI_COMPRESSION_FAILED

Данные, переданные в поток Brotli, не были успешно сжаты.

ERR_BROTLI_INVALID_PARAM

При построении потока Brotli был передан недопустимый ключ параметра.

ERR_BUFFER_CONTEXT_NOT_AVAILABLE

Была предпринята попытка создать экземпляр Node.js Buffer из кода аддона или embedder, находясь в JS-движке Context, который не связан с экземпляром Node.js. Данные, переданные в метод Buffer, будут освобождены к моменту возврата метода.

При возникновении этой ошибки возможной альтернативой созданию экземпляра Buffer является создание обычного Uint8Array, который отличается только прототипом получаемого объекта. Uint8Array общеприняты во всех основных API Node.js, где есть Buffer; они доступны во всех Contexts.

ERR_BUFFER_OUT_OF_BOUNDS

Была предпринята попытка выполнить операцию, выходящую за пределы Буфера.

ERR_BUFFER_TOO_LARGE

Была предпринята попытка создать Буфер большего размера, чем максимально допустимый.

ERR_CANNOT_WATCH_SIGINT

Node.js не смог проследить за сигналом SIGINT.

ERR_CHILD_CLOSED_BEFORE_REPLY

Дочерний процесс был закрыт до того, как родительский процесс получил ответ.

ERR_CHILD_PROCESS_IPC_REQUIRED

Используется, когда дочерний процесс форкируется без указания IPC-канала.

ERR_CHILD_PROCESS_STDIO_MAXBUFFER

Используется, когда основной процесс пытается прочитать данные из STDERR/STDOUT дочернего процесса, и длина данных превышает параметр maxBuffer.

ERR_CLOSED_MESSAGE_PORT

Была попытка использовать экземпляр MessagePort в закрытом состоянии, обычно после вызова .close().

ERR_CONSOLE_WRITABLE_STREAM

Console была создана без потока stdout, или Console имеет незаписываемый поток stdout или stderr.

ERR_CONSTRUCT_CALL_INVALID

Был вызван конструктор класса, который не является вызываемым.

ERR_CONSTRUCT_CALL_REQUIRED

Конструктор для класса был вызван без new.

ERR_CONTEXT_NOT_INITIALIZED

Контекст vm, переданный в API, еще не инициализирован. Это может произойти, если во время создания контекста произошла (и была поймана) ошибка, например, если при создании контекста произошел сбой выделения или был достигнут максимальный размер стека вызовов.

ERR_CRYPTO_CUSTOM_ENGINE_NOT_SUPPORTED

Был запрошен механизм клиентского сертификата, который не поддерживается используемой версией OpenSSL.

ERR_CRYPTO_ECDH_INVALID_FORMAT

В метод getPublicKey() класса crypto.ECDH() было передано недопустимое значение аргумента format.

ERR_CRYPTO_ECDH_INVALID_PUBLIC_KEY

В метод crypto.ECDH() класса computeSecret() было передано недопустимое значение аргумента key. Это означает, что открытый ключ лежит за пределами эллиптической кривой.

ERR_CRYPTO_ENGINE_UNKNOWN

В require('node:crypto').setEngine() был передан неверный идентификатор криптографического движка.

ERR_CRYPTO_FIPS_FORCED

Был использован аргумент командной строки --force-fips, но была попытка включить или отключить режим FIPS в модуле node:crypto.

ERR_CRYPTO_FIPS_UNAVAILABLE

Была предпринята попытка включить или отключить режим FIPS, но режим FIPS был недоступен.

ERR_CRYPTO_HASH_FINALIZED

hash.digest() был вызван несколько раз. Метод hash.digest() должен вызываться не более одного раза для каждого экземпляра объекта Hash.

ERR_CRYPTO_HASH_UPDATE_FAILED

hash.update() не удалось по какой-либо причине. Это должно происходить редко, если вообще происходит.

ERR_CRYPTO_INCOMPATIBLE_KEY

Данные криптографические ключи несовместимы с предпринимаемой операцией.

ERR_CRYPTO_INCOMPATIBLE_KEY_OPTIONS

Выбранная кодировка открытого или закрытого ключа несовместима с другими вариантами.

ERR_CRYPTO_INITIALIZATION_FAILED

Инициализация криптоподсистемы не удалась.

ERR_CRYPTO_INVALID_AUTH_TAG

Был предоставлен недопустимый тег аутентификации.

ERR_CRYPTO_INVALID_COUNTER

Для шифра с режимом счетчика был предоставлен некорректный счетчик.

ERR_CRYPTO_INVALID_CURVE

Была предоставлена недопустимая эллиптическая кривая.

ERR_CRYPTO_INVALID_DIGEST

Был указан неверный алгоритм криптодайджеста.

ERR_CRYPTO_INVALID_IV

Был предоставлен недопустимый вектор инициализации.

ERR_CRYPTO_INVALID_JWK

Был предоставлен недопустимый веб-ключ JSON.

ERR_CRYPTO_INVALID_KEY_OBJECT_TYPE

Тип данного объекта криптографического ключа не подходит для данной операции.

ERR_CRYPTO_INVALID_KEYLEN

Указана недопустимая длина ключа.

ERR_CRYPTO_INVALID_KEYPAIR

Была предоставлена недопустимая пара ключей.

ERR_CRYPTO_INVALID_KEYTYPE

Был предоставлен недопустимый тип ключа.

ERR_CRYPTO_INVALID_MESSAGELEN

Была предоставлена недопустимая длина сообщения.

ERR_CRYPTO_INVALID_SCRYPT_PARAMS

Были предоставлены неверные параметры алгоритма scrypt.

ERR_CRYPTO_INVALID_STATE

Метод crypto был использован на объекте, который находился в недопустимом состоянии. Например, вызов cipher.getAuthTag() перед вызовом cipher.final().

ERR_CRYPTO_INVALID_TAG_LENGTH

Была указана недопустимая длина тега аутентификации.

ERR_CRYPTO_JOB_INIT_FAILED

Инициализация асинхронной криптооперации не удалась.

ERR_CRYPTO_JWK_UNSUPPORTED_CURVE

Эллиптическая кривая ключа не зарегистрирована для использования в JSON Web Key Elliptic Curve Registry.

ERR_CRYPTO_JWK_UNSUPPORTED_KEY_TYPE

Асимметричный тип ключа не зарегистрирован для использования в JSON Web Key Types Registry.

ERR_CRYPTO_OPERATION_FAILED

Криптооперация завершилась неудачно по неустановленной причине.

ERR_CRYPTO_PBKDF2_ERROR

Алгоритм PBKDF2 не сработал по неустановленным причинам. OpenSSL не предоставляет более подробной информации, и, соответственно, Node.js тоже.

ERR_CRYPTO_SCRYPT_INVALID_PARAMETER

Один или несколько параметров crypto.scrypt() или crypto.scryptSync() находятся вне своего законного диапазона.

ERR_CRYPTO_SCRYPT_NOT_SUPPORTED

Node.js был скомпилирован без поддержки scrypt. Невозможно с двоичными файлами официального релиза, но может произойти с пользовательскими сборками, включая сборки дистрибутивов.

ERR_CRYPTO_SIGN_KEY_REQUIRED

Методу sign.sign() не был предоставлен ключ подписи.

ERR_CRYPTO_TIMING_SAFE_EQUAL_LENGTH

crypto.timingSafeEqual() был вызван с аргументами Buffer, TypedArray или DataView разной длины.

ERR_CRYPTO_UNKNOWN_CIPHER

Был указан неизвестный шифр.

ERR_CRYPTO_UNKNOWN_DH_GROUP

Указано неизвестное имя группы Диффи-Хеллмана. Список допустимых имен групп см. в crypto.getDiffieHellman().

ERR_CRYPTO_UNSUPPORTED_OPERATION

Была предпринята попытка вызвать неподдерживаемую криптооперацию.

ERR_DEBUGGER_ERROR

Произошла ошибка при работе с отладчиком.

ERR_DEBUGGER_STARTUP_ERROR

Отладчик затянул время, ожидая, пока освободится требуемый хост/порт.

ERR_DLOPEN_DISABLED

Загрузка родных аддонов была отключена с помощью --no-addons.

ERR_DLOPEN_FAILED

Вызов process.dlopen() не удался.

ERR_DIR_CLOSED

Каталог fs.Dir был ранее закрыт.

ERR_DIR_CONCURRENT_OPERATION

A synchronous read or close call was attempted on an fs.Dir which has ongoing asynchronous operations.

ERR_DNS_SET_SERVERS_FAILED

c-ares failed to set the DNS server.

ERR_DOMAIN_CALLBACK_NOT_AVAILABLE

The node:domain module was not usable since it could not establish the required error handling hooks, because process.setUncaughtExceptionCaptureCallback() had been called at an earlier point in time.

ERR_DOMAIN_CANNOT_SET_UNCAUGHT_EXCEPTION_CAPTURE

process.setUncaughtExceptionCaptureCallback() could not be called because the node:domain module has been loaded at an earlier point in time.

The stack trace is extended to include the point in time at which the node:domain module had been loaded.

ERR_DUPLICATE_STARTUP_SNAPSHOT_MAIN_FUNCTION

v8.startupSnapshot.setDeserializeMainFunction() could not be called because it had already been called before.

ERR_ENCODING_INVALID_ENCODED_DATA

Data provided to TextDecoder() API was invalid according to the encoding provided.

ERR_ENCODING_NOT_SUPPORTED

Encoding provided to TextDecoder() API was not one of the WHATWG Supported Encodings.

ERR_EVAL_ESM_CANNOT_PRINT

--print cannot be used with ESM input.

ERR_EVENT_RECURSION

Thrown when an attempt is made to recursively dispatch an event on EventTarget.

ERR_EXECUTION_ENVIRONMENT_NOT_AVAILABLE

The JS execution context is not associated with a Node.js environment. This may occur when Node.js is used as an embedded library and some hooks for the JS engine are not set up properly.

ERR_FALSY_VALUE_REJECTION

A Promise that was callbackified via util.callbackify() was rejected with a falsy value.

ERR_FEATURE_UNAVAILABLE_ON_PLATFORM

Used when a feature that is not available to the current platform which is running Node.js is used.

ERR_FS_CP_DIR_TO_NON_DIR

An attempt was made to copy a directory to a non-directory (file, symlink, etc.) using fs.cp().

ERR_FS_CP_EEXIST

An attempt was made to copy over a file that already existed with fs.cp(), with the force and errorOnExist set to true.

ERR_FS_CP_EINVAL

When using fs.cp(), src or dest pointed to an invalid path.

ERR_HTTP_CONTENT_LENGTH_MISMATCH

Response body size doesn’t match with the specified content-length header value.

ERR_FS_CP_FIFO_PIPE

An attempt was made to copy a named pipe with fs.cp().

ERR_FS_CP_NON_DIR_TO_DIR

An attempt was made to copy a non-directory (file, symlink, etc.) to a directory using fs.cp().

ERR_FS_CP_SOCKET

An attempt was made to copy to a socket with fs.cp().

ERR_FS_CP_SYMLINK_TO_SUBDIRECTORY

When using fs.cp(), a symlink in dest pointed to a subdirectory of src.

ERR_FS_CP_UNKNOWN

An attempt was made to copy to an unknown file type with fs.cp().

ERR_FS_EISDIR

Path is a directory.

ERR_FS_FILE_TOO_LARGE

An attempt has been made to read a file whose size is larger than the maximum allowed size for a Buffer.

ERR_FS_INVALID_SYMLINK_TYPE

An invalid symlink type was passed to the fs.symlink() or fs.symlinkSync() methods.

An attempt was made to add more headers after the headers had already been sent.

An invalid HTTP header value was specified.

ERR_HTTP_INVALID_STATUS_CODE

Status code was outside the regular status code range (100-999).

ERR_HTTP_REQUEST_TIMEOUT

The client has not sent the entire request within the allowed time.

ERR_HTTP_SOCKET_ENCODING

Changing the socket encoding is not allowed per RFC 7230 Section 3.

ERR_HTTP_TRAILER_INVALID

The Trailer header was set even though the transfer encoding does not support that.

ERR_HTTP2_ALTSVC_INVALID_ORIGIN

HTTP/2 ALTSVC frames require a valid origin.

ERR_HTTP2_ALTSVC_LENGTH

HTTP/2 ALTSVC frames are limited to a maximum of 16,382 payload bytes.

For HTTP/2 requests using the CONNECT method, the :authority pseudo-header is required.

ERR_HTTP2_CONNECT_PATH

For HTTP/2 requests using the CONNECT method, the :path pseudo-header is forbidden.

ERR_HTTP2_CONNECT_SCHEME

For HTTP/2 requests using the CONNECT method, the :scheme pseudo-header is forbidden.

ERR_HTTP2_ERROR

A non-specific HTTP/2 error has occurred.

ERR_HTTP2_GOAWAY_SESSION

New HTTP/2 Streams may not be opened after the Http2Session has received a GOAWAY frame from the connected peer.

Multiple values were provided for an HTTP/2 header field that was required to have only a single value.

An additional headers was specified after an HTTP/2 response was initiated.

An attempt was made to send multiple response headers.

ERR_HTTP2_INFO_STATUS_NOT_ALLOWED

Informational HTTP status codes (1xx) may not be set as the response status code on HTTP/2 responses.

HTTP/1 connection specific headers are forbidden to be used in HTTP/2 requests and responses.

An invalid HTTP/2 header value was specified.

ERR_HTTP2_INVALID_INFO_STATUS

An invalid HTTP informational status code has been specified. Informational status codes must be an integer between 100 and 199 (inclusive).

ERR_HTTP2_INVALID_ORIGIN

HTTP/2 ORIGIN frames require a valid origin.

ERR_HTTP2_INVALID_PACKED_SETTINGS_LENGTH

Input Buffer and Uint8Array instances passed to the http2.getUnpackedSettings() API must have a length that is a multiple of six.

Only valid HTTP/2 pseudoheaders (:status, :path, :authority, :scheme, and :method) may be used.

ERR_HTTP2_INVALID_SESSION

An action was performed on an Http2Session object that had already been destroyed.

ERR_HTTP2_INVALID_SETTING_VALUE

An invalid value has been specified for an HTTP/2 setting.

ERR_HTTP2_INVALID_STREAM

An operation was performed on a stream that had already been destroyed.

ERR_HTTP2_MAX_PENDING_SETTINGS_ACK

Whenever an HTTP/2 SETTINGS frame is sent to a connected peer, the peer is required to send an acknowledgment that it has received and applied the new SETTINGS. By default, a maximum number of unacknowledged SETTINGS frames may be sent at any given time. This error code is used when that limit has been reached.

ERR_HTTP2_NESTED_PUSH

An attempt was made to initiate a new push stream from within a push stream. Nested push streams are not permitted.

ERR_HTTP2_NO_MEM

Out of memory when using the http2session.setLocalWindowSize(windowSize) API.

ERR_HTTP2_NO_SOCKET_MANIPULATION

An attempt was made to directly manipulate (read, write, pause, resume, etc.) a socket attached to an Http2Session.

ERR_HTTP2_ORIGIN_LENGTH

HTTP/2 ORIGIN frames are limited to a length of 16382 bytes.

ERR_HTTP2_OUT_OF_STREAMS

The number of streams created on a single HTTP/2 session reached the maximum limit.

ERR_HTTP2_PAYLOAD_FORBIDDEN

A message payload was specified for an HTTP response code for which a payload is forbidden.

ERR_HTTP2_PING_CANCEL

An HTTP/2 ping was canceled.

ERR_HTTP2_PING_LENGTH

HTTP/2 ping payloads must be exactly 8 bytes in length.

An HTTP/2 pseudo-header has been used inappropriately. Pseudo-headers are header key names that begin with the : prefix.

ERR_HTTP2_PUSH_DISABLED

An attempt was made to create a push stream, which had been disabled by the client.

ERR_HTTP2_SEND_FILE

An attempt was made to use the Http2Stream.prototype.responseWithFile() API to send a directory.

ERR_HTTP2_SEND_FILE_NOSEEK

An attempt was made to use the Http2Stream.prototype.responseWithFile() API to send something other than a regular file, but offset or length options were provided.

ERR_HTTP2_SESSION_ERROR

The Http2Session closed with a non-zero error code.

ERR_HTTP2_SETTINGS_CANCEL

The Http2Session settings canceled.

ERR_HTTP2_SOCKET_BOUND

An attempt was made to connect a Http2Session object to a net.Socket or tls.TLSSocket that had already been bound to another Http2Session object.

ERR_HTTP2_SOCKET_UNBOUND

An attempt was made to use the socket property of an Http2Session that has already been closed.

ERR_HTTP2_STATUS_101

Use of the 101 Informational status code is forbidden in HTTP/2.

ERR_HTTP2_STATUS_INVALID

An invalid HTTP status code has been specified. Status codes must be an integer between 100 and 599 (inclusive).

ERR_HTTP2_STREAM_CANCEL

An Http2Stream was destroyed before any data was transmitted to the connected peer.

ERR_HTTP2_STREAM_ERROR

A non-zero error code was been specified in an RST_STREAM frame.

ERR_HTTP2_STREAM_SELF_DEPENDENCY

When setting the priority for an HTTP/2 stream, the stream may be marked as a dependency for a parent stream. This error code is used when an attempt is made to mark a stream and dependent of itself.

ERR_HTTP2_TOO_MANY_INVALID_FRAMES

The limit of acceptable invalid HTTP/2 protocol frames sent by the peer, as specified through the maxSessionInvalidFrames option, has been exceeded.

ERR_HTTP2_TRAILERS_ALREADY_SENT

Trailing headers have already been sent on the Http2Stream.

ERR_HTTP2_TRAILERS_NOT_READY

The http2stream.sendTrailers() method cannot be called until after the 'wantTrailers' event is emitted on an Http2Stream object. The 'wantTrailers' event will only be emitted if the waitForTrailers option is set for the Http2Stream.

ERR_HTTP2_UNSUPPORTED_PROTOCOL

http2.connect() was passed a URL that uses any protocol other than http: or https:.

ERR_ILLEGAL_CONSTRUCTOR

An attempt was made to construct an object using a non-public constructor.

ERR_IMPORT_ASSERTION_TYPE_FAILED

An import assertion has failed, preventing the specified module to be imported.

ERR_IMPORT_ASSERTION_TYPE_MISSING

An import assertion is missing, preventing the specified module to be imported.

ERR_IMPORT_ASSERTION_TYPE_UNSUPPORTED

An import assertion is not supported by this version of Node.js.

ERR_INCOMPATIBLE_OPTION_PAIR

An option pair is incompatible with each other and cannot be used at the same time.

ERR_INPUT_TYPE_NOT_ALLOWED

Stability: 1 — Experimental

The --input-type flag was used to attempt to execute a file. This flag can only be used with input via --eval, --print, or STDIN.

ERR_INSPECTOR_ALREADY_ACTIVATED

While using the node:inspector module, an attempt was made to activate the inspector when it already started to listen on a port. Use inspector.close() before activating it on a different address.

ERR_INSPECTOR_ALREADY_CONNECTED

While using the node:inspector module, an attempt was made to connect when the inspector was already connected.

ERR_INSPECTOR_CLOSED

While using the node:inspector module, an attempt was made to use the inspector after the session had already closed.

ERR_INSPECTOR_COMMAND

An error occurred while issuing a command via the node:inspector module.

ERR_INSPECTOR_NOT_ACTIVE

The inspector is not active when inspector.waitForDebugger() is called.

ERR_INSPECTOR_NOT_AVAILABLE

The node:inspector module is not available for use.

ERR_INSPECTOR_NOT_CONNECTED

While using the node:inspector module, an attempt was made to use the inspector before it was connected.

ERR_INSPECTOR_NOT_WORKER

An API was called on the main thread that can only be used from the worker thread.

ERR_INTERNAL_ASSERTION

There was a bug in Node.js or incorrect usage of Node.js internals. To fix the error, open an issue at https://github.com/nodejs/node/issues.

ERR_INVALID_ADDRESS_FAMILY

The provided address family is not understood by the Node.js API.

ERR_INVALID_ARG_TYPE

An argument of the wrong type was passed to a Node.js API.

ERR_INVALID_ARG_VALUE

An invalid or unsupported value was passed for a given argument.

ERR_INVALID_ASYNC_ID

An invalid asyncId or triggerAsyncId was passed using AsyncHooks. An id less than -1 should never happen.

ERR_INVALID_BUFFER_SIZE

A swap was performed on a Buffer but its size was not compatible with the operation.

ERR_INVALID_CHAR

Invalid characters were detected in headers.

ERR_INVALID_CURSOR_POS

A cursor on a given stream cannot be moved to a specified row without a specified column.

ERR_INVALID_FD

A file descriptor (‘fd’) was not valid (e.g. it was a negative value).

ERR_INVALID_FD_TYPE

A file descriptor (‘fd’) type was not valid.

ERR_INVALID_FILE_URL_HOST

A Node.js API that consumes file: URLs (such as certain functions in the fs module) encountered a file URL with an incompatible host. This situation can only occur on Unix-like systems where only localhost or an empty host is supported.

ERR_INVALID_FILE_URL_PATH

A Node.js API that consumes file: URLs (such as certain functions in the fs module) encountered a file URL with an incompatible path. The exact semantics for determining whether a path can be used is platform-dependent.

ERR_INVALID_HANDLE_TYPE

An attempt was made to send an unsupported “handle” over an IPC communication channel to a child process. See subprocess.send() and process.send() for more information.

ERR_INVALID_HTTP_TOKEN

An invalid HTTP token was supplied.

ERR_INVALID_IP_ADDRESS

An IP address is not valid.

ERR_INVALID_MIME_SYNTAX

The syntax of a MIME is not valid.

ERR_INVALID_MODULE

An attempt was made to load a module that does not exist or was otherwise not valid.

ERR_INVALID_MODULE_SPECIFIER

The imported module string is an invalid URL, package name, or package subpath specifier.

ERR_INVALID_OBJECT_DEFINE_PROPERTY

An error occurred while setting an invalid attribute on the property of an object.

ERR_INVALID_PACKAGE_CONFIG

An invalid package.json file failed parsing.

ERR_INVALID_PACKAGE_TARGET

The package.json "exports" field contains an invalid target mapping value for the attempted module resolution.

ERR_INVALID_PERFORMANCE_MARK

While using the Performance Timing API (perf_hooks), a performance mark is invalid.

ERR_INVALID_PROTOCOL

An invalid options.protocol was passed to http.request().

ERR_INVALID_REPL_EVAL_CONFIG

Both breakEvalOnSigint and eval options were set in the REPL config, which is not supported.

ERR_INVALID_REPL_INPUT

The input may not be used in the REPL. The conditions under which this error is used are described in the REPL documentation.

ERR_INVALID_RETURN_PROPERTY

Thrown in case a function option does not provide a valid value for one of its returned object properties on execution.

ERR_INVALID_RETURN_PROPERTY_VALUE

Thrown in case a function option does not provide an expected value type for one of its returned object properties on execution.

ERR_INVALID_RETURN_VALUE

Thrown in case a function option does not return an expected value type on execution, such as when a function is expected to return a promise.

ERR_INVALID_STATE

Indicates that an operation cannot be completed due to an invalid state. For instance, an object may have already been destroyed, or may be performing another operation.

ERR_INVALID_SYNC_FORK_INPUT

A Buffer, TypedArray, DataView, or string was provided as stdio input to an asynchronous fork. See the documentation for the child_process module for more information.

ERR_INVALID_THIS

A Node.js API function was called with an incompatible this value.

const urlSearchParams = new URLSearchParams(
  'foo=bar&baz=new'
);

const buf = Buffer.alloc(1);
urlSearchParams.has.call(buf, 'foo');
// Throws a TypeError with code 'ERR_INVALID_THIS'

ERR_INVALID_TRANSFER_OBJECT

An invalid transfer object was passed to postMessage().

ERR_INVALID_TUPLE

An element in the iterable provided to the WHATWG URLSearchParams constructor did not represent a [name, value] tuple – that is, if an element is not iterable, or does not consist of exactly two elements.

ERR_INVALID_URI

An invalid URI was passed.

ERR_INVALID_URL

An invalid URL was passed to the WHATWG URL constructor or the legacy url.parse() to be parsed. The thrown error object typically has an additional property 'input' that contains the URL that failed to parse.

ERR_INVALID_URL_SCHEME

An attempt was made to use a URL of an incompatible scheme (protocol) for a specific purpose. It is only used in the WHATWG URL API support in the fs module (which only accepts URLs with 'file' scheme), but may be used in other Node.js APIs as well in the future.

ERR_IPC_CHANNEL_CLOSED

An attempt was made to use an IPC communication channel that was already closed.

ERR_IPC_DISCONNECTED

An attempt was made to disconnect an IPC communication channel that was already disconnected. See the documentation for the child_process module for more information.

ERR_IPC_ONE_PIPE

An attempt was made to create a child Node.js process using more than one IPC communication channel. See the documentation for the child_process module for more information.

ERR_IPC_SYNC_FORK

An attempt was made to open an IPC communication channel with a synchronously forked Node.js process. See the documentation for the child_process module for more information.

ERR_LOADER_CHAIN_INCOMPLETE

An ESM loader hook returned without calling next() and without explicitly signaling a short circuit.

ERR_MANIFEST_ASSERT_INTEGRITY

An attempt was made to load a resource, but the resource did not match the integrity defined by the policy manifest. See the documentation for policy manifests for more information.

ERR_MANIFEST_DEPENDENCY_MISSING

An attempt was made to load a resource, but the resource was not listed as a dependency from the location that attempted to load it. See the documentation for policy manifests for more information.

ERR_MANIFEST_INTEGRITY_MISMATCH

An attempt was made to load a policy manifest, but the manifest had multiple entries for a resource which did not match each other. Update the manifest entries to match in order to resolve this error. See the documentation for policy manifests for more information.

ERR_MANIFEST_INVALID_RESOURCE_FIELD

A policy manifest resource had an invalid value for one of its fields. Update the manifest entry to match in order to resolve this error. See the documentation for policy manifests for more information.

ERR_MANIFEST_INVALID_SPECIFIER

A policy manifest resource had an invalid value for one of its dependency mappings. Update the manifest entry to match to resolve this error. See the documentation for policy manifests for more information.

ERR_MANIFEST_PARSE_POLICY

An attempt was made to load a policy manifest, but the manifest was unable to be parsed. See the documentation for policy manifests for more information.

ERR_MANIFEST_TDZ

An attempt was made to read from a policy manifest, but the manifest initialization has not yet taken place. This is likely a bug in Node.js.

ERR_MANIFEST_UNKNOWN_ONERROR

A policy manifest was loaded, but had an unknown value for its “onerror” behavior. See the documentation for policy manifests for more information.

ERR_MEMORY_ALLOCATION_FAILED

An attempt was made to allocate memory (usually in the C++ layer) but it failed.

ERR_MESSAGE_TARGET_CONTEXT_UNAVAILABLE

A message posted to a MessagePort could not be deserialized in the target vm Context. Not all Node.js objects can be successfully instantiated in any context at this time, and attempting to transfer them using postMessage() can fail on the receiving side in that case.

ERR_METHOD_NOT_IMPLEMENTED

A method is required but not implemented.

ERR_MISSING_ARGS

A required argument of a Node.js API was not passed. This is only used for strict compliance with the API specification (which in some cases may accept func(undefined) but not func()). In most native Node.js APIs, func(undefined) and func() are treated identically, and the ERR_INVALID_ARG_TYPE error code may be used instead.

ERR_MISSING_OPTION

For APIs that accept options objects, some options might be mandatory. This code is thrown if a required option is missing.

ERR_MISSING_PASSPHRASE

An attempt was made to read an encrypted key without specifying a passphrase.

ERR_MISSING_PLATFORM_FOR_WORKER

The V8 platform used by this instance of Node.js does not support creating Workers. This is caused by lack of embedder support for Workers. In particular, this error will not occur with standard builds of Node.js.

ERR_MISSING_TRANSFERABLE_IN_TRANSFER_LIST

An object that needs to be explicitly listed in the transferList argument is in the object passed to a postMessage() call, but is not provided in the transferList for that call. Usually, this is a MessagePort.

In Node.js versions prior to v15.0.0, the error code being used here was ERR_MISSING_MESSAGE_PORT_IN_TRANSFER_LIST. However, the set of transferable object types has been expanded to cover more types than MessagePort.

ERR_MODULE_NOT_FOUND

A module file could not be resolved by the ECMAScript modules loader while attempting an import operation or when loading the program entry point.

ERR_MULTIPLE_CALLBACK

A callback was called more than once.

A callback is almost always meant to only be called once as the query can either be fulfilled or rejected but not both at the same time. The latter would be possible by calling a callback more than once.

ERR_NAPI_CONS_FUNCTION

While using Node-API, a constructor passed was not a function.

ERR_NAPI_INVALID_DATAVIEW_ARGS

While calling napi_create_dataview(), a given offset was outside the bounds of the dataview or offset + length was larger than a length of given buffer.

ERR_NAPI_INVALID_TYPEDARRAY_ALIGNMENT

While calling napi_create_typedarray(), the provided offset was not a multiple of the element size.

ERR_NAPI_INVALID_TYPEDARRAY_LENGTH

While calling napi_create_typedarray(), (length * size_of_element) + byte_offset was larger than the length of given buffer.

ERR_NAPI_TSFN_CALL_JS

An error occurred while invoking the JavaScript portion of the thread-safe function.

ERR_NAPI_TSFN_GET_UNDEFINED

An error occurred while attempting to retrieve the JavaScript undefined value.

ERR_NAPI_TSFN_START_IDLE_LOOP

On the main thread, values are removed from the queue associated with the thread-safe function in an idle loop. This error indicates that an error has occurred when attempting to start the loop.

ERR_NAPI_TSFN_STOP_IDLE_LOOP

Once no more items are left in the queue, the idle loop must be suspended. This error indicates that the idle loop has failed to stop.

ERR_NOT_BUILDING_SNAPSHOT

An attempt was made to use operations that can only be used when building V8 startup snapshot even though Node.js isn’t building one.

ERR_NO_CRYPTO

An attempt was made to use crypto features while Node.js was not compiled with OpenSSL crypto support.

ERR_NO_ICU

An attempt was made to use features that require ICU, but Node.js was not compiled with ICU support.

ERR_NON_CONTEXT_AWARE_DISABLED

A non-context-aware native addon was loaded in a process that disallows them.

ERR_OUT_OF_RANGE

A given value is out of the accepted range.

ERR_PACKAGE_IMPORT_NOT_DEFINED

The package.json "imports" field does not define the given internal package specifier mapping.

ERR_PACKAGE_PATH_NOT_EXPORTED

The package.json "exports" field does not export the requested subpath. Because exports are encapsulated, private internal modules that are not exported cannot be imported through the package resolution, unless using an absolute URL.

ERR_PARSE_ARGS_INVALID_OPTION_VALUE

When strict set to true, thrown by util.parseArgs() if a {boolean} value is provided for an option of type {string}, or if a {string} value is provided for an option of type {boolean}.

ERR_PARSE_ARGS_UNEXPECTED_POSITIONAL

Thrown by util.parseArgs(), when a positional argument is provided and allowPositionals is set to false.

ERR_PARSE_ARGS_UNKNOWN_OPTION

When strict set to true, thrown by util.parseArgs() if an argument is not configured in options.

ERR_PERFORMANCE_INVALID_TIMESTAMP

An invalid timestamp value was provided for a performance mark or measure.

ERR_PERFORMANCE_MEASURE_INVALID_OPTIONS

Invalid options were provided for a performance measure.

ERR_PROTO_ACCESS

Accessing Object.prototype.__proto__ has been forbidden using --disable-proto=throw. Object.getPrototypeOf and Object.setPrototypeOf should be used to get and set the prototype of an object.

ERR_REQUIRE_ESM

Stability: 1 — Experimental

An attempt was made to require() an ES Module.

ERR_SCRIPT_EXECUTION_INTERRUPTED

Script execution was interrupted by SIGINT (For example, Ctrl+C was pressed.)

ERR_SCRIPT_EXECUTION_TIMEOUT

Script execution timed out, possibly due to bugs in the script being executed.

ERR_SERVER_ALREADY_LISTEN

The server.listen() method was called while a net.Server was already listening. This applies to all instances of net.Server, including HTTP, HTTPS, and HTTP/2 Server instances.

ERR_SERVER_NOT_RUNNING

The server.close() method was called when a net.Server was not running. This applies to all instances of net.Server, including HTTP, HTTPS, and HTTP/2 Server instances.

ERR_SOCKET_ALREADY_BOUND

An attempt was made to bind a socket that has already been bound.

ERR_SOCKET_BAD_BUFFER_SIZE

An invalid (negative) size was passed for either the recvBufferSize or sendBufferSize options in dgram.createSocket().

ERR_SOCKET_BAD_PORT

An API function expecting a port >= 0 and < 65536 received an invalid value.

ERR_SOCKET_BAD_TYPE

An API function expecting a socket type (udp4 or udp6) received an invalid value.

ERR_SOCKET_BUFFER_SIZE

While using dgram.createSocket(), the size of the receive or send Buffer could not be determined.

ERR_SOCKET_CLOSED

An attempt was made to operate on an already closed socket.

ERR_SOCKET_CLOSED_BEFORE_CONNECTION

When calling net.Socket.write() on a connecting socket and the socket was closed before the connection was established.

ERR_SOCKET_DGRAM_IS_CONNECTED

A dgram.connect() call was made on an already connected socket.

ERR_SOCKET_DGRAM_NOT_CONNECTED

A dgram.disconnect() or dgram.remoteAddress() call was made on a disconnected socket.

ERR_SOCKET_DGRAM_NOT_RUNNING

A call was made and the UDP subsystem was not running.

ERR_SRI_PARSE

A string was provided for a Subresource Integrity check, but was unable to be parsed. Check the format of integrity attributes by looking at the Subresource Integrity specification.

ERR_STREAM_ALREADY_FINISHED

A stream method was called that cannot complete because the stream was finished.

ERR_STREAM_CANNOT_PIPE

An attempt was made to call stream.pipe() on a Writable stream.

ERR_STREAM_DESTROYED

A stream method was called that cannot complete because the stream was destroyed using stream.destroy().

ERR_STREAM_NULL_VALUES

An attempt was made to call stream.write() with a null chunk.

ERR_STREAM_PREMATURE_CLOSE

An error returned by stream.finished() and stream.pipeline(), when a stream or a pipeline ends non gracefully with no explicit error.

ERR_STREAM_PUSH_AFTER_EOF

An attempt was made to call stream.push() after a null(EOF) had been pushed to the stream.

ERR_STREAM_UNSHIFT_AFTER_END_EVENT

An attempt was made to call stream.unshift() after the 'end' event was emitted.

ERR_STREAM_WRAP

Prevents an abort if a string decoder was set on the Socket or if the decoder is in objectMode.

const Socket = require('node:net').Socket;
const instance = new Socket();

instance.setEncoding('utf8');

ERR_STREAM_WRITE_AFTER_END

An attempt was made to call stream.write() after stream.end() has been called.

ERR_STRING_TOO_LONG

An attempt has been made to create a string longer than the maximum allowed length.

ERR_SYNTHETIC

An artificial error object used to capture the call stack for diagnostic reports.

ERR_SYSTEM_ERROR

An unspecified or non-specific system error has occurred within the Node.js process. The error object will have an err.info object property with additional details.

ERR_TAP_LEXER_ERROR

An error representing a failing lexer state.

ERR_TAP_PARSER_ERROR

An error representing a failing parser state. Additional information about the token causing the error is available via the cause property.

ERR_TAP_VALIDATION_ERROR

This error represents a failed TAP validation.

ERR_TEST_FAILURE

This error represents a failed test. Additional information about the failure is available via the cause property. The failureType property specifies what the test was doing when the failure occurred.

ERR_TLS_CERT_ALTNAME_FORMAT

This error is thrown by checkServerIdentity if a user-supplied subjectaltname property violates encoding rules. Certificate objects produced by Node.js itself always comply with encoding rules and will never cause this error.

ERR_TLS_CERT_ALTNAME_INVALID

While using TLS, the host name/IP of the peer did not match any of the subjectAltNames in its certificate.

ERR_TLS_DH_PARAM_SIZE

While using TLS, the parameter offered for the Diffie-Hellman (DH) key-agreement protocol is too small. By default, the key length must be greater than or equal to 1024 bits to avoid vulnerabilities, even though it is strongly recommended to use 2048 bits or larger for stronger security.

ERR_TLS_HANDSHAKE_TIMEOUT

A TLS/SSL handshake timed out. In this case, the server must also abort the connection.

ERR_TLS_INVALID_CONTEXT

The context must be a SecureContext.

ERR_TLS_INVALID_PROTOCOL_METHOD

The specified secureProtocol method is invalid. It is either unknown, or disabled because it is insecure.

ERR_TLS_INVALID_PROTOCOL_VERSION

Valid TLS protocol versions are 'TLSv1', 'TLSv1.1', or 'TLSv1.2'.

ERR_TLS_INVALID_STATE

The TLS socket must be connected and securely established. Ensure the ‘secure’ event is emitted before continuing.

ERR_TLS_PROTOCOL_VERSION_CONFLICT

Attempting to set a TLS protocol minVersion or maxVersion conflicts with an attempt to set the secureProtocol explicitly. Use one mechanism or the other.

ERR_TLS_PSK_SET_IDENTIY_HINT_FAILED

Failed to set PSK identity hint. Hint may be too long.

ERR_TLS_RENEGOTIATION_DISABLED

An attempt was made to renegotiate TLS on a socket instance with renegotiation disabled.

ERR_TLS_REQUIRED_SERVER_NAME

While using TLS, the server.addContext() method was called without providing a host name in the first parameter.

ERR_TLS_SESSION_ATTACK

An excessive amount of TLS renegotiations is detected, which is a potential vector for denial-of-service attacks.

ERR_TLS_SNI_FROM_SERVER

An attempt was made to issue Server Name Indication from a TLS server-side socket, which is only valid from a client.

ERR_TRACE_EVENTS_CATEGORY_REQUIRED

The trace_events.createTracing() method requires at least one trace event category.

ERR_TRACE_EVENTS_UNAVAILABLE

The node:trace_events module could not be loaded because Node.js was compiled with the --without-v8-platform flag.

ERR_TRANSFORM_ALREADY_TRANSFORMING

A Transform stream finished while it was still transforming.

ERR_TRANSFORM_WITH_LENGTH_0

A Transform stream finished with data still in the write buffer.

ERR_TTY_INIT_FAILED

The initialization of a TTY failed due to a system error.

ERR_UNAVAILABLE_DURING_EXIT

Function was called within a process.on('exit') handler that shouldn’t be called within process.on('exit') handler.

ERR_UNCAUGHT_EXCEPTION_CAPTURE_ALREADY_SET

process.setUncaughtExceptionCaptureCallback() was called twice, without first resetting the callback to null.

This error is designed to prevent accidentally overwriting a callback registered from another module.

ERR_UNESCAPED_CHARACTERS

A string that contained unescaped characters was received.

ERR_UNHANDLED_ERROR

An unhandled error occurred (for instance, when an 'error' event is emitted by an EventEmitter but an 'error' handler is not registered).

ERR_UNKNOWN_BUILTIN_MODULE

Used to identify a specific kind of internal Node.js error that should not typically be triggered by user code. Instances of this error point to an internal bug within the Node.js binary itself.

ERR_UNKNOWN_CREDENTIAL

A Unix group or user identifier that does not exist was passed.

ERR_UNKNOWN_ENCODING

An invalid or unknown encoding option was passed to an API.

ERR_UNKNOWN_FILE_EXTENSION

Stability: 1 — Experimental

An attempt was made to load a module with an unknown or unsupported file extension.

ERR_UNKNOWN_MODULE_FORMAT

Stability: 1 — Experimental

An attempt was made to load a module with an unknown or unsupported format.

ERR_UNKNOWN_SIGNAL

An invalid or unknown process signal was passed to an API expecting a valid signal (such as subprocess.kill()).

ERR_UNSUPPORTED_DIR_IMPORT

import a directory URL is unsupported. Instead, self-reference a package using its name and define a custom subpath in the "exports" field of the package.json file.

import './'; // unsupported
import './index.js'; // supported
import 'package-name'; // supported

ERR_UNSUPPORTED_ESM_URL_SCHEME

import with URL schemes other than file and data is unsupported.

ERR_USE_AFTER_CLOSE

Stability: 1 — Experimental

An attempt was made to use something that was already closed.

ERR_VALID_PERFORMANCE_ENTRY_TYPE

While using the Performance Timing API (perf_hooks), no valid performance entry types are found.

ERR_VM_DYNAMIC_IMPORT_CALLBACK_MISSING

A dynamic import callback was not specified.

ERR_VM_MODULE_ALREADY_LINKED

The module attempted to be linked is not eligible for linking, because of one of the following reasons:

  • It has already been linked (linkingStatus is 'linked')
  • It is being linked (linkingStatus is 'linking')
  • Linking has failed for this module (linkingStatus is 'errored')

ERR_VM_MODULE_CACHED_DATA_REJECTED

The cachedData option passed to a module constructor is invalid.

ERR_VM_MODULE_CANNOT_CREATE_CACHED_DATA

Cached data cannot be created for modules which have already been evaluated.

ERR_VM_MODULE_DIFFERENT_CONTEXT

The module being returned from the linker function is from a different context than the parent module. Linked modules must share the same context.

ERR_VM_MODULE_LINK_FAILURE

The module was unable to be linked due to a failure.

ERR_VM_MODULE_NOT_MODULE

The fulfilled value of a linking promise is not a vm.Module object.

ERR_VM_MODULE_STATUS

The current module’s status does not allow for this operation. The specific meaning of the error depends on the specific function.

ERR_WASI_ALREADY_STARTED

The WASI instance has already started.

ERR_WASI_NOT_STARTED

The WASI instance has not been started.

ERR_WEBASSEMBLY_RESPONSE

The Response that has been passed to WebAssembly.compileStreaming or to WebAssembly.instantiateStreaming is not a valid WebAssembly response.

ERR_WORKER_INIT_FAILED

The Worker initialization failed.

ERR_WORKER_INVALID_EXEC_ARGV

The execArgv option passed to the Worker constructor contains invalid flags.

ERR_WORKER_NOT_RUNNING

An operation failed because the Worker instance is not currently running.

ERR_WORKER_OUT_OF_MEMORY

The Worker instance terminated because it reached its memory limit.

ERR_WORKER_PATH

The path for the main script of a worker is neither an absolute path nor a relative path starting with ./ or ../.

ERR_WORKER_UNSERIALIZABLE_ERROR

All attempts at serializing an uncaught exception from a worker thread failed.

ERR_WORKER_UNSUPPORTED_OPERATION

The requested functionality is not supported in worker threads.

ERR_ZLIB_INITIALIZATION_FAILED

Creation of a zlib object failed due to incorrect configuration.

Too much HTTP header data was received. In order to protect against malicious or malconfigured clients, if more than 8 KiB of HTTP header data is received then HTTP parsing will abort without a request or response object being created, and an Error with this code will be emitted.

HPE_UNEXPECTED_CONTENT_LENGTH

Server is sending both a Content-Length header and Transfer-Encoding: chunked.

Transfer-Encoding: chunked allows the server to maintain an HTTP persistent connection for dynamically generated content. In this case, the Content-Length HTTP header cannot be used.

Use Content-Length or Transfer-Encoding: chunked.

MODULE_NOT_FOUND

Файл модуля не может быть разрешен загрузчиком модулей CommonJS при попытке выполнить операцию require() или при загрузке точки входа программы.

Legacy Node.js error codes¶

Stability: 0 — Deprecated. These error codes are either inconsistent, or have been removed.

ERR_CANNOT_TRANSFER_OBJECT

The value passed to postMessage() contained an object that is not supported for transferring.

ERR_CRYPTO_HASH_DIGEST_NO_UTF16

The UTF-16 encoding was used with hash.digest(). While the hash.digest() method does allow an encoding argument to be passed in, causing the method to return a string rather than a Buffer, the UTF-16 encoding (e.g. ucs or utf16le) is not supported.

ERR_HTTP2_FRAME_ERROR

Used when a failure occurs sending an individual frame on the HTTP/2 session.

Used when an HTTP/2 Headers Object is expected.

Used when a required header is missing in an HTTP/2 message.

HTTP/2 informational headers must only be sent prior to calling the Http2Stream.prototype.respond() method.

ERR_HTTP2_STREAM_CLOSED

Used when an action has been performed on an HTTP/2 Stream that has already been closed.

ERR_HTTP_INVALID_CHAR

Used when an invalid character is found in an HTTP response status message (reason phrase).

ERR_INDEX_OUT_OF_RANGE

A given index was out of the accepted range (e.g. negative offsets).

ERR_INVALID_OPT_VALUE

An invalid or unexpected value was passed in an options object.

ERR_INVALID_OPT_VALUE_ENCODING

An invalid or unknown file encoding was passed.

ERR_MISSING_MESSAGE_PORT_IN_TRANSFER_LIST

This error code was replaced by ERR_MISSING_TRANSFERABLE_IN_TRANSFER_LIST in Node.js v15.0.0, because it is no longer accurate as other types of transferable objects also exist now.

ERR_NAPI_CONS_PROTOTYPE_OBJECT

Used by the Node-API when Constructor.prototype is not an object.

ERR_NETWORK_IMPORT_BAD_RESPONSE

Stability: 1 — Experimental

Response was received but was invalid when importing a module over the network.

ERR_NETWORK_IMPORT_DISALLOWED

Stability: 1 — Experimental

A network module attempted to load another module that it is not allowed to load. Likely this restriction is for security reasons.

ERR_NO_LONGER_SUPPORTED

A Node.js API was called in an unsupported manner, such as Buffer.write(string, encoding, offset[, length]).

ERR_OPERATION_FAILED

An operation failed. This is typically used to signal the general failure of an asynchronous operation.

ERR_OUTOFMEMORY

Used generically to identify that an operation caused an out of memory condition.

ERR_PARSE_HISTORY_DATA

The node:repl module was unable to parse data from the REPL history file.

ERR_SOCKET_CANNOT_SEND

Data could not be sent on a socket.

ERR_STDERR_CLOSE

An attempt was made to close the process.stderr stream. By design, Node.js does not allow stdout or stderr streams to be closed by user code.

ERR_STDOUT_CLOSE

An attempt was made to close the process.stdout stream. By design, Node.js does not allow stdout or stderr streams to be closed by user code.

ERR_STREAM_READ_NOT_IMPLEMENTED

Used when an attempt is made to use a readable stream that has not implemented readable._read().

ERR_TLS_RENEGOTIATION_FAILED

Used when a TLS renegotiation request has failed in a non-specific way.

ERR_TRANSFERRING_EXTERNALIZED_SHAREDARRAYBUFFER

A SharedArrayBuffer whose memory is not managed by the JavaScript engine or by Node.js was encountered during serialization. Such a SharedArrayBuffer cannot be serialized.

This can only happen when native addons create SharedArrayBuffers in “externalized” mode, or put existing SharedArrayBuffer into externalized mode.

ERR_UNKNOWN_STDIN_TYPE

An attempt was made to launch a Node.js process with an unknown stdin file type. This error is usually an indication of a bug within Node.js itself, although it is possible for user code to trigger it.

ERR_UNKNOWN_STREAM_TYPE

An attempt was made to launch a Node.js process with an unknown stdout or stderr file type. This error is usually an indication of a bug within Node.js itself, although it is possible for user code to trigger it.

ERR_V8BREAKITERATOR

The V8 BreakIterator API was used but the full ICU data set is not installed.

ERR_VALUE_OUT_OF_RANGE

Used when a given value is out of the accepted range.

ERR_VM_MODULE_NOT_LINKED

The module must be successfully linked before instantiation.

ERR_VM_MODULE_LINKING_ERRORED

The linker function returned a module for which linking has failed.

ERR_WORKER_UNSUPPORTED_EXTENSION

The pathname used for the main script of a worker has an unknown file extension.

ERR_ZLIB_BINDING_CLOSED

Used when an attempt is made to use a zlib object after it has already been closed.

ERR_CPU_USAGE

Собственный вызов из process.cpuUsage не может быть обработан.

Icon Ex Номер ошибки: Ошибка 3021
Название ошибки: Microsoft Access Error 3021
Описание ошибки: No current record.
Разработчик: Microsoft Corporation
Программное обеспечение: Microsoft Access
Относится к: Windows XP, Vista, 7, 8, 10, 11

Объяснение «Microsoft Access Error 3021»

«Microsoft Access Error 3021» также считается ошибкой во время выполнения (ошибкой). Когда дело доходит до программного обеспечения, как Microsoft Access, инженеры могут использовать различные инструменты, чтобы попытаться сорвать эти ошибки как можно скорее. Ошибки, такие как ошибка 3021, иногда удаляются из отчетов, оставляя проблему остается нерешенной в программном обеспечении.

Ошибка 3021 может столкнуться с пользователями Microsoft Access, если они регулярно используют программу, также рассматривается как «No current record.». Когда появится ошибка, пользователи компьютеров смогут уведомить разработчика о наличии ошибки 3021 через отчеты об ошибках. Затем Microsoft Corporation нужно будет исправить эти ошибки в главном исходном коде и предоставить модифицированную версию для загрузки. Эта ситуация происходит из-за обновления программного обеспечения Microsoft Access является одним из решений ошибок 3021 ошибок и других проблем.

Сбой во время запуска Microsoft Access или во время выполнения, как правило, когда вы столкнетесь с «Microsoft Access Error 3021». Вот три наиболее заметные причины ошибки ошибки 3021 во время выполнения происходят:

Ошибка 3021 Crash — Ошибка 3021 остановит компьютер от выполнения обычной программной операции. Это происходит много, когда продукт (Microsoft Access) или компьютер не может обрабатывать уникальные входные данные.

Утечка памяти «Microsoft Access Error 3021» — последствия утечки памяти Microsoft Access связаны с неисправной операционной системой. Потенциальные триггеры могут быть «бесконечным циклом», или когда программа выполняет «цикл» или повторение снова и снова.

Ошибка 3021 Logic Error — Компьютерная система создает неверную информацию или дает другой результат, даже если входные данные являются точными. Обычные причины этой проблемы связаны с ошибками в обработке данных.

Большинство ошибок Microsoft Access Error 3021 являются результатом отсутствия или повреждения версии файла, установленного Microsoft Access. Как правило, решить проблему можно заменой файла Microsoft Corporation. Кроме того, некоторые ошибки Microsoft Access Error 3021 могут возникать по причине наличия неправильных ссылок на реестр. По этой причине для очистки недействительных записей рекомендуется выполнить сканирование реестра.

Распространенные сообщения об ошибках в Microsoft Access Error 3021

Обнаруженные проблемы Microsoft Access Error 3021 с Microsoft Access включают:

  • «Ошибка программы Microsoft Access Error 3021. «
  • «Ошибка программного обеспечения Win32: Microsoft Access Error 3021»
  • «Microsoft Access Error 3021 должен быть закрыт. «
  • «Файл Microsoft Access Error 3021 не найден.»
  • «Microsoft Access Error 3021 не может быть найден. «
  • «Проблема при запуске приложения: Microsoft Access Error 3021. «
  • «Файл Microsoft Access Error 3021 не запущен.»
  • «Ошибка Microsoft Access Error 3021. «
  • «Ошибка пути программного обеспечения: Microsoft Access Error 3021. «

Обычно ошибки Microsoft Access Error 3021 с Microsoft Access возникают во время запуска или завершения работы, в то время как программы, связанные с Microsoft Access Error 3021, выполняются, или редко во время последовательности обновления ОС. Запись ошибок Microsoft Access Error 3021 внутри Microsoft Access имеет решающее значение для обнаружения неисправностей электронной Windows и ретрансляции обратно в Microsoft Corporation для параметров ремонта.

Создатели Microsoft Access Error 3021 Трудности

Проблемы Microsoft Access Error 3021 могут быть отнесены к поврежденным или отсутствующим файлам, содержащим ошибки записям реестра, связанным с Microsoft Access Error 3021, или к вирусам / вредоносному ПО.

В частности, проблемы с Microsoft Access Error 3021, вызванные:

  • Недопустимый Microsoft Access Error 3021 или поврежденный раздел реестра.
  • Вирус или вредоносное ПО, повреждающее Microsoft Access Error 3021.
  • Microsoft Access Error 3021 ошибочно удален или злонамеренно программным обеспечением, не связанным с приложением Microsoft Access.
  • Microsoft Access Error 3021 конфликтует с другой программой (общим файлом).
  • Microsoft Access (Microsoft Access Error 3021) поврежден во время загрузки или установки.

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  1. Как исправить время выполнения Ошибка 3021 Ошибка Microsoft Access 3021
  2. Vba runtime error 3021
  3. Answered by:
  4. Question
  5. Answers
  6. Thread: [RESOLVED] Run-Time Error ‘3021’ No Current Record Found
  7. [RESOLVED] Run-Time Error ‘3021’ No Current Record Found
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Как исправить время выполнения Ошибка 3021 Ошибка Microsoft Access 3021

В этой статье представлена ошибка с номером Ошибка 3021, известная как Ошибка Microsoft Access 3021, описанная как Текущих записей нет.

Информация об ошибке

Имя ошибки: Ошибка Microsoft Access 3021
Номер ошибки: Ошибка 3021
Описание: Текущих записей нет.
Программное обеспечение: Microsoft Access
Разработчик: Microsoft

Этот инструмент исправления может устранить такие распространенные компьютерные ошибки, как BSODs, зависание системы и сбои. Он может заменить отсутствующие файлы операционной системы и библиотеки DLL, удалить вредоносное ПО и устранить вызванные им повреждения, а также оптимизировать ваш компьютер для максимальной производительности.

О программе Runtime Ошибка 3021

Время выполнения Ошибка 3021 происходит, когда Microsoft Access дает сбой или падает во время запуска, отсюда и название. Это не обязательно означает, что код был каким-то образом поврежден, просто он не сработал во время выполнения. Такая ошибка появляется на экране в виде раздражающего уведомления, если ее не устранить. Вот симптомы, причины и способы устранения проблемы.

Определения (Бета)

Здесь мы приводим некоторые определения слов, содержащихся в вашей ошибке, в попытке помочь вам понять вашу проблему. Эта работа продолжается, поэтому иногда мы можем неправильно определить слово, так что не стесняйтесь пропустить этот раздел!

  • Доступ — НЕ ИСПОЛЬЗУЙТЕ этот тег для Microsoft Access, используйте вместо него [ms-access]
  • Запись — запись в программирование — это тип данных с метками для доступа к полям записи.
  • Access . Microsoft Access, также известный как Microsoft Office Access, представляет собой систему управления базами данных от Microsoft, которая обычно объединяет реляционный Microsoft JetACE Database Engine с графическим пользовательским интерфейсом и инструментами разработки программного обеспечения.
  • Microsoft Access — Microsoft Access, также известный как Microsoft Office Access, представляет собой систему управления базами данных от Microsoft который обычно сочетает в себе реляционное ядро ​​СУБД Microsoft JetACE с графическим пользовательским интерфейсом и инструментами разработки программного обеспечения.
Симптомы Ошибка 3021 — Ошибка Microsoft Access 3021

Ошибки времени выполнения происходят без предупреждения. Сообщение об ошибке может появиться на экране при любом запуске %программы%. Фактически, сообщение об ошибке или другое диалоговое окно может появляться снова и снова, если не принять меры на ранней стадии.

Возможны случаи удаления файлов или появления новых файлов. Хотя этот симптом в основном связан с заражением вирусом, его можно отнести к симптомам ошибки времени выполнения, поскольку заражение вирусом является одной из причин ошибки времени выполнения. Пользователь также может столкнуться с внезапным падением скорости интернет-соединения, но, опять же, это не всегда так.

(Ошибка Microsoft Access 3021) Repair Tool»/>
(Только для примера)

Причины Ошибка Microsoft Access 3021 — Ошибка 3021

При разработке программного обеспечения программисты составляют код, предвидя возникновение ошибок. Однако идеальных проектов не бывает, поскольку ошибки можно ожидать даже при самом лучшем дизайне программы. Глюки могут произойти во время выполнения программы, если определенная ошибка не была обнаружена и устранена во время проектирования и тестирования.

Ошибки во время выполнения обычно вызваны несовместимостью программ, запущенных в одно и то же время. Они также могут возникать из-за проблем с памятью, плохого графического драйвера или заражения вирусом. Каким бы ни был случай, проблему необходимо решить немедленно, чтобы избежать дальнейших проблем. Ниже приведены способы устранения ошибки.

Методы исправления

Ошибки времени выполнения могут быть раздражающими и постоянными, но это не совсем безнадежно, существует возможность ремонта. Вот способы сделать это.

Если метод ремонта вам подошел, пожалуйста, нажмите кнопку upvote слева от ответа, это позволит другим пользователям узнать, какой метод ремонта на данный момент работает лучше всего.

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Vba runtime error 3021

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Question

Run-time Error 3021: No Current Record

I get this error while I try to Import Excel file in one of the MS Access tables using VBA. Attaching screenshot, how to solve this please??
Just to be clear, I’ve made sure «tblBoQ» table and «C:ImportBoQ» Excel files are at place. So there’s no question about it.

Answers

>>>. but now when I split the table in a FE/BE scenario, it gives me below error. Why is it so please??

According to your description, I have reproduced this issue. Regarding this issue, based on my research, two main reasons for the occurrence of the above error message are discussed below:

1. Appending of the records that were the primary key values

2. Violating referential integrity rules for a relationship defined between tables

You could use Get External Data wizard to import Excel file, after you have completed the Import wizard, Access notifies you of any problems that might have occurred during the import process. In some cases, Access might create a new table called ImportErrors, which contains any data that it was unable to import successfully. You can examine the data in this table to try to find out why the data did not import correctly.

For more information, click here to refer about Introduction to importing and exporting data

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Thread: [RESOLVED] Run-Time Error ‘3021’ No Current Record Found

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[RESOLVED] Run-Time Error ‘3021’ No Current Record Found

I’ve read through the other threads on this topic but they don’t seem to apply to my problem. I have a 1 row table that I’m trying to read into a recordset using VB6, but when I try to access any of the fields in the record, I get a runtime error 3021 «No current record».

I thought that when you use the Set Recordset command the recordset is populated with the contents of the target table. But that’s not happening. Can someone tell me what I’m doing wrong? Any help is greatly appreciated. Here’s my code:

Database: MS Access
Field: mpSalesRankTier1
Data type: Number
Content: 10000
Number of rows in table: 1

Last edited by vb6coder14; Oct 20th, 2014 at 01:03 PM .

Re: Run-Time Error ‘3021’ No Current Record Found

It looks like you are using DAO
Then:
1 Reference the DAO library
2 Change the lines where you declare and where you open Recordset

. If your problem is fixed don’t forget to mark your threads as resolved using the Thread Tools menu .

Re: Run-Time Error ‘3021’ No Current Record Found

jggtz, I made all of the changes you suggested and no dice. I’m still getting the same problem.

Re: Run-Time Error ‘3021’ No Current Record Found

I happen to still use the DAO often. vb6coder14, with the DAO, it’s possible to have the recordset sitting on a non-record, and that’s exactly the case when you initially open a recordset.

All that’s necessary is that you execute a rsCtrlRec.MoveFirst command before you try and read the fields.

Be careful though. That will also throw an error if there are no records in the table. If you also want to avoid that, do something like «If rsCtrlRec.RecordCount > 0 Then . «

Re: Run-Time Error ‘3021’ No Current Record Found

It’s been a while since I have done DAO, so these are only observations, but here it goes..

1- dim rsCtrlRec as RecordSet is valid if your DAO reference is set correctly. (no need for DAO.)

2- Set rsCtrlRec = dbCtrlRec.OpenRecordset(«SYS_CONTROL_RECORD») is ok too

3- I always use indexed recordset, and by habit, I always include the line :

to avoid BOF conditions

4- Make sure you have records :

5- check the position of the record pointer with rsCtrlRec.BOF and rsCtrlRec.EOF when encountering problems such as you have. For example, if you have no records, after opening the recordset :

rsCtrlRec.MoveFirst
if rsCtrlRec.BOF then
rem there are no records
end if

6- and last, but it should have been the first point mentioned, are you sure there is not typo in your field name, and that the field indeed does exist.. you can get the value of a field by its index number instead of a literal

will return the value for the first field in the table, no matter what it’s literal name is. this will also indicate that you have indeed at least one field defined if no error is returned.

Re: Run-Time Error ‘3021’ No Current Record Found

Navion, you can use .MoveFirst, .MoveNext, .MovePrev, and .MoveLast without an index. There’s just no guarantee of the order of the records.

With no index, you just don’t get the use of .Seek. which is where the real power is.

Re: Run-Time Error ‘3021’ No Current Record Found

vb6coder14, here’s the DAO help file, in case you don’t have it. As Navion hinted, also be sure to learn the meaning of .BOF and .EOF. If you’re just using an .MDB style database, I’ve found the DAO to be an incredibly powerful tool. Elegant, bulletproof, and simple.

Re: Run-Time Error ‘3021’ No Current Record Found

Yeah sure. Except for a generic SQL handler program I have written way back then (i still use it and it never required any updating ever since) that used non indexed tables, all the rest of my work uses indexes and since my code rarely fails if ever , I keep methods that have proven their worth , even if things could be done some other ways.

Old habits die hard. For example, I never use :

Dim a as String

It will always be

for me although I am not real strong on Option Explicit why bother and be nagged countless times. I can keep track of variables on my own loll

When you put too much restrictions on coding, it becomes VB 2010 and I don’t wish that anyone

Re: Run-Time Error ‘3021’ No Current Record Found

Hey Navion, I’m totally with you. I mostly work alone these days, but I’ve had to fire programmers in the past who wouldn’t leave unbroken code alone. If it ain’t broke, DON’T FIX IT! There’s another «code sharing» thread on here where I made a similar point. The sharing of .BAS (or other) files in multiple .VBP project is a monumentally bad idea in my opinion. It’s the same issue, someone «fixing» code for one project that breaks another.

I’ll have to admit that I go back to the a!, a$, and a# days, but I have managed to wean myself into the new «as string» etc format. The only similar habit that I won’t break is Left$(s, 4), Mid$(s, 2, 5), etc. I do use variants and even like them, but I do stay away from them whenever possible. (Just noting that Left(s,4) returns a variant whereas Left$(s,4) returns a string.

Oh geez, I’m a HUGE advocate of Option Explicit. SOOO many times before we had it, I can remember beating my head against the wall, when it was just a variable name typo. In fact, I’ve long advocated that there should also be an Option TypeExplicit that applied to Redim as well as functions. I mean, if I want a variant or a late bound object, I’ll declare it as such.

I’ll agree that they should stay the meta-commands (Option . ), but they do make finding bugs easier.

Re: Run-Time Error ‘3021’ No Current Record Found

Its been a while since I have used DAO but I do not remember ever needing to issue a movefirst to get to an active record when a recordset is first opened.

Of course there is no code there that checks to see if any records were returned so my guess would be that movefirst would also throw an error as I suspect the problem is that the recordset is empty

Re: Run-Time Error ‘3021’ No Current Record Found

You know what, DataMiser? You’re right. I guess I’ve just never thought to NOT do a .MoveFirst. I just tested it and the recordset opens on the first record. Actually, all of my tables DO have indices (including PrimaryKey indices), so I’m not sure what happens on tables without an index, but that’s interesting.

Re: Run-Time Error ‘3021’ No Current Record Found

I do not think the presence of or absence of indexes/primary keys would have any effect either.

They will of course make your queries faster when using criteria that is indexed but as far as moving next, previous, first, last I would not expect there to be any difference.

Re: Run-Time Error ‘3021’ No Current Record Found

DataMiser is right. The recordset is empty. What threw me was my lack of understanding of the internal workings of a .MDB file. I actually manually keyed values into the database, but I didn’t hit the ENTER key. I went straight to SAVE. Consequently, although it appeared as if I had data, I really didn’t.

It wasn’t until I physically went back into the database and hit the ENTER key when a 2nd record appeared, this one prefixed with an ‘*’. I’m going to assume that’s the EOF pointer. When I ran my code again, it worked just fine.

Can someone confirm my interpretation of what happened, or am I still off base in my understanding?

Re: Run-Time Error ‘3021’ No Current Record Found

I wrote a paper back in the early days of VB, when they introduced Variants as the default data , destroying old myths and urban legends about stronger typed variables from old time programmers (although I am one of those myself). I do like variants but I use Typed variables too a lot, most often than not actually.

At some point, I got a bit lazy and started to use the variant versions of the common string functions too. but not anymore. they are slower and introduce an element of uncertainty (in my mind anyway, no real rationale on that argument). I reverted back to the mid$ and Trim$ etc. I think readability is much improved.

I have read your posts these past few days, and between the lines too. I think we both would get along

Re: Run-Time Error ‘3021’ No Current Record Found

Before a MoveFirst is called, shouldn’t the recordset be checked for .EOF? I see that the posted code is using the generic ON ERROR GOTO [label], but checking for .EOF after returning the recordset can allow the option of using some default values vs. exiting the routine if .MoveFirst cause an error. Just thinking out loud

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Re: Run-Time Error ‘3021’ No Current Record Found

Yep, you’re right LaVolpe, but that’s why I mentioned the RecordCount property in post #4. If it’s got records, a MoveFirst will never fail.

And a smile and nod to Navion. )) Are we all having fun now? LMAO

Re: Run-Time Error ‘3021’ No Current Record Found

A recordset, depending on type & sql provider, can have an initial value of -1 if I recall correctly

Insomnia is just a byproduct of, » It can’t be done»

Classics Enthusiast ? Here’s my 1969 Mustang Mach I Fastback. Her sister ’67 Coupe has been adopted

Re: Run-Time Error ‘3021’ No Current Record Found

Yes, but for my own common use, I use indexed tables, a movefirst (that I don’t remember throwing an error on empty recordset), followed by a seek and a NoMatch that will take care of the EOF if any. Navigating down, of course, checking EOF is required.

On error should not be really be used doing DAO, good coding should use BOF, EOF, NoMatch (index stuff). That does not leave much causes for errors

Re: Run-Time Error ‘3021’ No Current Record Found

Indeed Elroy! Indeed! Almost a chat room atmosphere. But let’s not hijack the OP’s thread too much (for the record lolll)

Re: Run-Time Error ‘3021’ No Current Record Found

Navion, I totally agree. I have my share of On Error Resume Next, and On Error Goto . in my code, but I very seldom use it when using DAO methods. I either get it right, or I debug it.

Actually, I just looked around at some of my standard DAO procedures and did find this code:

I did put error ignoring in there, but, truth be told, I’ve now got no idea why. However, going back to something I said earlier today, if it ain’t broken, don’t fix it.

Re: Run-Time Error ‘3021’ No Current Record Found

Honestly, don’t mess with DAO much any longer, but with ADO. Per MSDN: «A call to either MoveFirst or MoveLast when the Recordset is empty (both BOF and EOF are True) generates an error.»

To avoid that situation, my general iteration of the recordset kinda looks like this

Insomnia is just a byproduct of, » It can’t be done»

Classics Enthusiast ? Here’s my 1969 Mustang Mach I Fastback. Her sister ’67 Coupe has been adopted

Re: Run-Time Error ‘3021’ No Current Record Found

Yep, I seldom let these conditions happen, but I believe that an empty recordset will set both .BOF and .EOF as true. And I think that’s the only time it happens. Also, I’m pretty sure that the DAO and the ADO are VERY similar (if not identical) regarding all of these relatively straightforward procedures.

Re: Run-Time Error ‘3021’ No Current Record Found

Funny that you should mention that Elroy, I forgot to do it myself. another essential of DAO is IsNull, particularly with binary fields, they don’t like much being cast to empty strings, although .FieldSize does the job too.

Re: Run-Time Error ‘3021’ No Current Record Found

Yes, .Recordcount will return -1 in cases where recordcount is not supported. I can’t remember if this is the case with DAO but ADO will return -1 when using a server side cursor no matter how many records there may be.

Checking for .eof is a more fool proof method.

Re: Run-Time Error ‘3021’ No Current Record Found

When using DAO .RecordCount will give you the result only after a .MoveLast method

. If your problem is fixed don’t forget to mark your threads as resolved using the Thread Tools menu .

Источник

After every execution, regardless of said execution — when using Chrome web browser the PHP local server throws this error:

Invalid request (Unexpected EOF) \n

It’s not causing any visible issues; however as it’s a persistent issue I was wondering if something may bite me later.

Any ideas?

Note: it happens roughly 10 seconds after any page is executed.

Further note: This happens after all executions, even when the files
are ended correctly:

<?php echo 'hey'; ?> 

would still throw the aforementioned error.

[Thu Mar 19 09:39:55 2015] 127.0.0.1:53923 [200]: /admin
[Thu Mar 19 09:40:05 2015] 127.0.0.1:53924 Invalid request (Unexpected EOF)

This is the full error.

asked Mar 19, 2015 at 9:43

Jack hardcastle's user avatar

Jack hardcastleJack hardcastle

2,7564 gold badges22 silver badges41 bronze badges

6

This is a known bug.

From https://bugs.php.net/bug.php?id=60471:

[2011-12-08 15:01 UTC] lolautruche at gmail dot com Description:
————
From time to time, built-in server with router script logs this kind of stuff :

[Thu Dec 8 13:39:29 2011] 127.0.0.1:50358 Invalid request (Unexpected
EOF)

This happens quite randomly, whatever the script has a close tag or
not, whatever it has a blank line after close tag or not.

And the explanation:

[2012-02-23 18:45 UTC] michal dot pipa dot xsolve at gmail dot com

Chromium has feature called «Predict network actions to improve page
load performance» and its enabled by default. It works this way, that
if HTML page has links to some resources, than Chromium opens about
10 TCP connections in advance. And then if browser has less than 10
resources to fetch, unused connections times out after 10 seconds.
And this (empty payload) causes PHP server to display «Invalid request
(unexpected EOF)» message.

It is a harmless error from the PHP built-in server.

Sᴀᴍ Onᴇᴌᴀ's user avatar

Sᴀᴍ Onᴇᴌᴀ

8,2188 gold badges36 silver badges58 bronze badges

answered Nov 25, 2015 at 6:12

Gary's user avatar

GaryGary

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1

This could be related to Chrome specifically and its network prediction feature. So try to disable that feature first. That’s why it works for you in Incognito mode, because probably it’s disabled in that mode.

You can find this option in Chrome Settings and click on ‘Show advanced settings’. Should be there in Privacy section.

Use a prediction service to help complete searches and URLs typed in the address bar or the app launcher search box

answered Mar 19, 2015 at 10:52

kenorb's user avatar

kenorbkenorb

156k88 gold badges679 silver badges743 bronze badges

5

This is bug on PHP. It was fixed on PHP 7.2

answered Nov 9, 2017 at 23:00

rsc's user avatar

rscrsc

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1

On Laravel, I realize this thread hasn’t been active for a while now but I found a solution completely unrelated to what other people have been posting. So I realized that I was getting this very error because I didn’t have an application key set for my application. You can find out more about application keys in this other Stack Overflow question. Before attempting to generate an application key, make sure you’ve run the following command in the root directory of your application.

composer install

From what I’ve read, when you create a new application via the

laravel new application

command, you should have a file called .env by default. This was not my case, I had to rename the .env.example file to .env manually.
Once you have done the two above steps, run this command in the root directory of your app

php artisan key:generate

This solved the OP’s error for me. Hope it can help someone in the future.

answered Oct 21, 2017 at 22:47

Gaboik1's user avatar

Gaboik1Gaboik1

3633 silver badges15 bronze badges

On Laravel 4.2, I resolve that when I clear the cache with command :
php artisan cache:clear


Complete list of commands is available with : php artisan list

answered Feb 18, 2016 at 14:25

Nolwennig's user avatar

NolwennigNolwennig

1,61324 silver badges29 bronze badges

1

I started to encounter this phenomenon just recently with both Firefox and Chrome.
I can’t confirm nor deny any problems with browser plugins.
Since I hadn’t change anything in my development environment I started to look for other possibilities.
Turns out it was the real time scan engine of the new version of my antivirus program.
Once I excluded my project build folders, the php installation folder and php.exe from the scanning the problems with sudden eof occurrences instantly vanished.
Maybe this helps some of you.

answered Oct 29, 2015 at 17:16

codar's user avatar

I confirmed that @user194714’s suggestion is indeed a reason (maybe not the only one though). I’m using WordPress 4.7.1 and changing wp-admin/about.php @ line 55 resolved this issue. More importantly, the page loaded faster after this simple change. I will let WordPress maintainers know.

answered Jan 25, 2017 at 21:07

Earnie Boyd's user avatar

In my case, I’m using laravel 5.1 + AngularJs and I had removed the route:

**Route::get('/', function () {
    return view('app');
});**

I put this back and now it works fine.

Touheed Khan's user avatar

answered May 16, 2017 at 3:40

Rodrigo Araújo's user avatar

I had this error when running PHP on port 9000; after changing it to 8000 the error disappeared.

Das_Geek's user avatar

Das_Geek

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answered Jan 7, 2020 at 13:44

Daniel Kukula's user avatar

I see this behaviour when in index.html

<script src="main.js"></script>

is replaced with

<script src="main.js" />

(instead of closing </script> tag its short version is used />).

answered Jun 18, 2015 at 3:38

mp31415's user avatar

mp31415mp31415

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0

Table of Contents
Hide
  1. What is an unexpected EOF while parsing error in Python?
  2. How to fix SyntaxError: unexpected EOF while parsing?
    1. Scenario 1 – Missing parenthesis or Unclosed parenthesis
    2. Scenario 2: Incomplete functions along with statements, loops, try and except 
  3. Conclusion

The SyntaxError: unexpected EOF while parsing occurs if the Python interpreter reaches the end of your source code before executing all the code blocks. This happens if you forget to close the parenthesis or if you have forgotten to add the code in the blocks statements such as for, if, while, etc. To solve this error check if all the parenthesis are closed properly and you have at least one line of code written after the statements such as for, if, while, and functions.

What is an unexpected EOF while parsing error in Python?

EOF stands for End of File and SyntaxError: unexpected EOF while parsing error occurs where the control in the code reaches the end before all the code is executed. 

Generally, if you forget to complete a code block in python code, you will get an error “SyntaxError: unexpected EOF while parsing.”

Most programming languages like C, C++, and Java use curly braces { } to define a block of code. Python, on the other hand, is a “block-structured language” that uses indentation.

A Python program is constructed from code blocks. A block is a piece of Python program text that is executed as a unit. The following are blocks: a module, a function body, and a class definition. Each command typed interactively is a block.

There are several reasons why we get this error while writing the python code. Let us look into each of the scenarios and solve the issue.

Sometimes if the code is not indented properly you will get unindent does not match any outer indentation error.

Scenario 1 – Missing parenthesis or Unclosed parenthesis

One of the most common scenarios is an unclosed parenthesis (), brackets [], and curly braces {} in the Python code.

  • Parenthesis is mainly used in print statements, declaring tuples, calling the built-in or user-defined methods, etc.
  • Square brackets are used in declaring the Arrays, Lists, etc in Python
  • Curly braces are mainly used in creating the dictionary and JSON objects.

In the below example, we have taken simple use cases to demonstrate the issue. In larger applications, the code will be more complex and we should use IDEs such as VS Code, and PyCharm which detect and highlights these common issues to developers.

# Paranthesis is not closed properly in the Print Statement
print("Hello"

# Square bracket is not closed while declaring the list
items =[1,2,3,4,5


# Curly Braces is not closed while creating the dictionary
dictionary={ 'FirstName':'Jack'

Output

SyntaxError: unexpected EOF while parsing

If you look at the above code, we have a print statement where the parenthesis has not closed, a list where the square bracket is not closed, and a dictionary where the curly braces are not closed. Python interpreter will raise unexpected EOF while parsing.

Solution :

We can fix the issue by enclosing the braces, parenthesis, and square brackets properly in the code as shown below.

# Paranthesis is now closed properly in the Print Statement
print("Hello")

# Square bracket is now closed while declaring the list
items =[1,2,3,4,5]
print(items)

# Curly Braces is now closed while creating the dictionary
dictionary={ 'FirstName':'Jack'}
print(dictionary)

Output

Hello
[1, 2, 3, 4, 5]
{'FirstName': 'Jack'}

If we try to execute the program notice the error is gone and we will get the output as expected.

Scenario 2: Incomplete functions along with statements, loops, try and except 

The other scenario is if you have forgotten to add the code after the Python statements, loops, and methods.

  • if Statement / if else Statement
  • try-except statement
  • for loop
  • while loop
  • user-defined function

Python expects at least one line of code to be present right after these statements and loops. If you have forgotten or missed to add code inside these code blocks Python will raise SyntaxError: unexpected EOF while parsing

Let us look at some of these examples to demonstrate the issue. For demonstration, all the code blocks are added as a single code snippet.


# Code is missing after the for loop
fruits = ["apple","orange","grapes","pineapple"]
for i in fruits :

# Code is missing after the if statement
a=5
if (a>10):


# Code is missing after the else statement
a=15
if (a>10):
    print("Number is greater than 10")
else:


# Code is missing after the while loop
num=15
while(num<20):

# Code is missing after the method declaration
def add(a,b):

Output

SyntaxError: unexpected EOF while parsing

Solution :

We can fix the issue by addressing all the issues in each code block as mentioned below.

  • for loop: We have added the print statement after the for loop.
  • if else statement: After the conditional check we have added the print statement which fixes the issue.
  • while loop: We have added a print statement and also incremented the counter until the loop satisfies the condition.
  • method: The method definition cannot be empty we have added the print statement to fix the issue.
# For loop fixed
fruits = ["apple", "orange", "grapes", "pineapple"]
for i in fruits:
    print(i)

# if statement fixed
a = 5
if a > 10:
    print("number is greated than 10")
else:
    print("number is lesser than 10")

# if else statement fixed
a = 15
if a > 10:
    print("Number is greater than 10")
else:
    print("number is lesser than 10")


# while loop fixed
num = 15
while num < 20:
    print("Current Number is", num)
    num = num + 1


# Method fix
def add(a, b):
    print("Hello Python")


add(4, 5)

Output

apple
orange
grapes
pineapple
number is lesser than 10
Number is greater than 10
Current Number is 15
Current Number is 16
Current Number is 17
Current Number is 18
Current Number is 19
Hello Python

Conclusion

The SyntaxError: unexpected EOF while parsing occurs if the Python interpreter reaches the end of your source code before executing all the code blocks. To resolve the SyntaxError: unexpected EOF while parsing in Python, make sure that you follow the below steps.

  1. Check for Proper Indentation in the code.
  2. Make sure all the parenthesis, brackets, and curly braces are opened and closed correctly.
  3. At least one statement of code exists in loops, statements, and functions.
  4. Verify the syntax, parameters, and the closing statements

This post was last Updated on by Himanshu Tyagi to reflect the accuracy and up-to-date information on the page.

In this tutorial, you will learn how fix unexpected EOF while parsing error in Python. Unexpected EOF while parsing error is a Syntax error and occurs when the interpreter reaches the end of the python code before any code block is complete. This error occurs when the body is not coded/included inside conditional statements (if, else), loops (for, while), functions, etc.

Below are the cases when the “Unexpected EOF While Parsing Error” occurs and also provided the ways to fix those errors.

Also Read: How To Copy List in Python

How to Fix Unexpected EOF While Parsing Error In Python

how to fix unexpected eof while parsing error in python

1. Fix – Unexpected EOF while parsing error when using conditional statements

Unexpected EOF while parsing error occurs in conditional statements when any if, else statement is used without a single line of the body.

Example 1: Let’s look into the sample code which throws the Unexpected EOF error while using the if statement.

Code:

number = 1
if(number==1):

Error:

File "<ipython-input-2-8cb60fd8f815>", line 2
    if(number==1):
                  ^
SyntaxError: unexpected EOF while parsing

Also Read: 10 Best Programming Apps To Learn Python

2. Fix – Unexpected EOF while parsing error when using loops

Unexpected EOF while parsing error occurs in loops when any for/while statement is used without a single line of body inside them.

Example 1: Let’s look into the sample code that throws the Unexpected EOF error while using the loop.

sum=0
# sum of 1-10 numbers
for i in range(1,11):

Error
File "<ipython-input-7-1f8b5a6d6ae0>", line 3
    for i in range(1,11):
                         ^
SyntaxError: unexpected EOF while parsing

The error unexpected EOF while parsing occurred because the for loop didn’t consist of a body/code to execute inside the loop. So to fix this error, we need to add the code block inside the for loop.

Code Fix:

sum=0
# sum of 1-10 numbers
for i in range(1,11):
    sum=sum+i
print("Sum of 1-10 numbers = ",sum)

Output:

Sum of 1-10 numbers =  55

Also Read: Python Program To Reverse A Number

Example 2: Let’s look into the sample code which throws the Unexpected EOF error while using a while loop.

Code:

number=1
# print 1 to 10 number
while(i<=10):

Error:

File "<ipython-input-10-f825e1f8a55a>", line 3
    while(i<=10):
                 ^
SyntaxError: unexpected EOF while parsing

The error unexpected EOF while parsing occurred because the while loop didn’t consist of a body/code to execute. So to fix this error, we need to add the code block inside the while loop.

Also Read: Python Program to Find Sum of Digits [5 Methods]

Code Fix:

number=1
# print 1 to 10 number
while(number<=10):
    print(number,end=" ")
    number=number+1

Output:

1 2 3 4 5 6 7 8 9 10

Also Read: Python Program To Check If A Number Is a Perfect Square

3. Fix – Unexpected EOF while parsing error in functions

Unexpected EOF while parsing error occurs in function when any function is defined without a body or when we made syntax mistakes while calling the function.

Example 1: Let’s look into the sample code which throws the Unexpected EOF error when we define any function with no body.

Code:

def findEvenorNot(number):

Error:

File "<ipython-input-17-7cb37f6aa589>", line 1
    def findEvenorNot(number):
                              ^
SyntaxError: unexpected EOF while parsing

The error unexpected EOF while parsing occurred because the function findEvenorNot is defined without anybody/code. So to fix this error, we need to add the code block inside the function.

Code Fix:

def findEvenorNot(number):
    if(number%2==0):
        print(number," is Even")
    else:
        print(number," is Odd")
        
findEvenorNot(24)

Output:

24 is Even

Also Read: Increment and Decrement Operators in Python

Example 2: Let’s look into another sample code that throws the Unexpected EOF error when we call a function with incorrect syntax.

Code:

def findEvenorNot(number):
    if(number%2==0):
        print(number," is Even")
    else:
        print(number," is Odd")
        
findEvenorNot(

Error:

File "<ipython-input-24-35123bc59f61>", line 7
    findEvenorNot(
                  ^
SyntaxError: unexpected EOF while parsing

The error unexpected EOF while parsing occurred because the function call had incorrect syntax. So to fix this error, we need to call the function with proper syntax i.e., functionName(parameter1, parameter2, …..).

Also Read: Python Dictionary Length [How To Get Length]

Code Fix:

def findEvenorNot(number):
    if(number%2==0):
        print(number," is Even")
    else:
        print(number," is Odd")
        
findEvenorNot(831)

Output:

831  is Odd

Also Read: How To Concatenate Arrays in Python [With Examples]

4. Fix – Unexpected EOF while parsing error due to missing parenthesis

Unexpected EOF while parsing error also occurs if we miss any parentheses while using any standard/user-defined functions.

Note: The above example also comes under this category.

Example: Let’s look into an example code that throws the Unexpected EOF error due to missing parenthesis.

Code:

programmingLanguages=["C", "C++","Java","Python","JS"]

for lang in programmingLanguages:
    print(lang

Error:

File "<ipython-input-27-c9c853e4f9e6>", line 4
    print(lang
              ^
SyntaxError: unexpected EOF while parsing

The error unexpected EOF while parsing occurred due to closing parenthesis miss in the print statement. So to fix this error, we need to add the missing parenthesis.

Code Fix:

programmingLanguages=["C", "C++","Java","Python","JS"]

for lang in programmingLanguages:
    print(lang)

Output:

C

C++

Java

Python

JS

Also Read: What Does The Python Percent Sign Mean?

5. Fix – Unexpected EOF while parsing error in Try Except blocks

Unexpected EOF while parsing error also occurs if we didn’t include an except block for a try block.

Example: Let’s look into an example code that throws the Unexpected EOF error due to missing an except block for a try block.

Code:

number = 18

try:
    result = number/0
    print(result)

Error:

File "<ipython-input-2-79e117053f09>", line 5
    print(result)
                 ^
SyntaxError: unexpected EOF while parsing

The error unexpected EOF while parsing occurred due to the absence of except block for a try block. So to fix this error, we need to include an except block for the try block.

Code Fix:

number = 18

try:
    result = number/0
    print(result)
    
except:
    print("Division by zero exception")

Output:

Division by zero exception

Also Read: How to Create an Empty Array In Python

Summary

These are some ways when the “unexpected EOF while parsing” error occurs and ways to fix the errors.

Himanshu Tyagi

Have you seen the syntax error “unexpected EOF while parsing” when you run a Python program? Are you looking for a fix? You are in the right place.

The error “unexpected EOF while parsing” occurs when the interpreter reaches the end of a Python file before every code block is complete. This can happen, for example, if any of the following is not present: the body of a loop (for / while), the code inside an if else statement, the body of a function.

We will go through few examples that show when the “unexpected EOF while parsing” error occurs and what code you have to add to fix it.

Let’s get started!

How Do You Fix the EOF While Parsing Error in Python?

If the unexpected EOF error occurs when running a Python program, this is usually a sign that some code is missing.

This is a syntax error that shows that a specific Python statement doesn’t follow the syntax expected by the Python interpreter.

For example, when you use a for loop you have to specify one or more lines of code inside the loop.

The same applies to an if statement or to a Python function.

To fix the EOF while parsing error in Python you have to identify the construct that is not following the correct syntax and add any missing lines to make the syntax correct.

The exception raised by the Python interpreter will give you an idea about the line of code where the error has been encountered.

Once you know the line of code you can identify the potential code missing and add it in the right place (remember that in Python indentation is also important).

SyntaxError: Unexpected EOF While Parsing with a For Loop

Let’s see the syntax error that occurs when you write a for loop to go through the elements of a list but you don’t complete the body of the loop.

In a Python file called eof_for.py define the following list:

animals = ['lion', 'tiger', 'elephant']

Then write the line below:

for animal in animals:

This is what happens when you execute this code…

$ python eof_for.py
  File "eof_for.py", line 4
    
                          ^
SyntaxError: unexpected EOF while parsing

A SyntaxError is raised by the Python interpreter.

The exception “SyntaxError: unexpected EOF while parsing” is raised by the Python interpreter when using a for loop if the body of the for loop is missing.

The end of file is unexpected because the interpreter expects to find the body of the for loop before encountering the end of the Python code.

To get rid of the unexpected EOF while parsing error you have to add a body to the for loop. For example a single line that prints the elements of the list:

for animal in animals:
    print(animal)

Update the Python program, execute it and confirm that the error doesn’t appear anymore.

Unexpected EOF While Parsing When Using an If Statement

Let’s start with the following Python list:

animals = ['lion', 'tiger', 'elephant']

Then write the first line of a if statement that verifies if the size of the animals list is great than 2:

if len(animals) > 2:

At this point we don’t add any other line to our code and we try to run this code.

$ python eof_if.py 
  File "eof_if.py", line 4
    
                        ^
SyntaxError: unexpected EOF while parsing

We get back the error “unexpected EOF while parsing”.

The Python interpreter raises the unexpected EOF while parsing exception when using an if statement if the code inside the if condition is not present.

Now let’s do the following:

  • Add a print statement inside the if condition.
  • Specify an else condition immediately after that.
  • Don’t write any code inside the else condition.
animals = ['lion', 'tiger', 'elephant']

if len(animals) > 2:
    print("The animals list has more than two elements")
else:

When you run this code you get the following output.

$ python eof_if.py 
  File "eof_if.py", line 6
    
         ^
SyntaxError: unexpected EOF while parsing

This time the error is at line 6 that is the line immediately after the else statement.

The Python interpreter doesn’t like the fact that the Python file ends before the else block is complete.

That’s why to fix this error we add another print statement inside the else statement.

if len(animals) > 2:
    print("The animals list has more than two elements")
else:
    print("The animals list has less than two elements")
$ python eof_if.py 
The animals list has more than two elements

The error doesn’t appear anymore and the execution of the Python program is correct.

Note: we are adding the print statements just as examples. You could add any lines you want inside the if and else statements to complete the expected structure for the if else statement.

Unexpected EOF While Parsing With Python Function

The error “unexpected EOF while parsing” occurs with Python functions when the body of the function is not provided.

To replicate this error write only the first line of a Python function called calculate_sum(). The function takes two parameters, x and y.

def calculate_sum(x,y):

At this point this is the only line of code in our program. Execute the program…

$ python eof_function.py
  File "eof_function.py", line 4
    
    ^
SyntaxError: unexpected EOF while parsing

The EOF error again!

Let’s say we haven’t decided yet what the implementation of the function will be. Then we can simply specify the Python pass statement.

def calculate_sum(x,y):
    pass

Execute the program, confirm that there is no output and that the Python interpreter doesn’t raise the exception anymore.

The exception “unexpected EOF while parsing” can occur with several types of Python loops: for loops but also while loops.

On the first line of your program define an integer called index with value 10.

Then write a while condition that gets executed as long as index is bigger than zero.

index = 10

while (index > 0):

There is something missing in our code…

…we haven’t specified any logic inside the while loop.

When you execute the code the Python interpreter raises an EOF SyntaxError because the while loop is missing its body.

$ python eof_while.py 
  File "eof_while.py", line 4
    
                      ^
SyntaxError: unexpected EOF while parsing

Add two lines to the while loop. The two lines print the value of the index and then decrease the index by 1.

index = 10

while (index > 0):
    print("The value of index is " + str(index))
    index = index - 1

The output is correct and the EOF error has disappeared.

$ python eof_while.py
The value of index is 10
The value of index is 9
The value of index is 8
The value of index is 7
The value of index is 6
The value of index is 5
The value of index is 4
The value of index is 3
The value of index is 2
The value of index is 1

Unexpected EOF While Parsing Due to Missing Brackets

The error “unexpected EOF while parsing” can also occur when you miss brackets in a given line of code.

For example, let’s write a print statement:

print("Codefather"

As you can see I have forgotten the closing bracket at the end of the line.

Let’s see how the Python interpreter handles that…

$ python eof_brackets.py
  File "eof_brackets.py", line 2
    
                      ^
SyntaxError: unexpected EOF while parsing

It raises the SyntaxError that we have already seen multiple times in this tutorial.

Add the closing bracket at the end of the print statement and confirm that the code works as expected.

Unexpected EOF When Calling a Function With Incorrect Syntax

Now we will see what happens when we define a function correctly but we miss a bracket in the function call.

def print_message(message):
    print(message)


print_message(

The definition of the function is correct but the function call was supposed to be like below:

print_message()

Instead we have missed the closing bracket of the function call and here is the result.

$ python eof_brackets.py
  File "eof_brackets.py", line 6
    
                  ^
SyntaxError: unexpected EOF while parsing

Add the closing bracket to the function call and confirm that the EOF error disappears.

Unexpected EOF While Parsing With Try Except

A scenario in which the unexpected EOF while parsing error can occur is when you use a try statement and you forget to add the except or finally statement.

Let’s call a function inside a try block without adding an except block and see what happens…

def print_message(message):
    print(message)


try:
    print_message()

When you execute this code the Python interpreter finds the end of the file before the end of the exception handling block (considering that except is missing).

$ python eof_try_except.py 
  File "eof_try_except.py", line 7
    
                    ^
SyntaxError: unexpected EOF while parsing

The Python interpreter finds the error on line 7 that is the line immediately after the last one.

That’s because it expects to find a statement that completes the try block and instead it finds the end of the file.

To fix this error you can add an except or finally block.

try:
    print_message()
except:
    print("An exception occurred while running the function print_message()")

When you run this code you get the exception message because we haven’t passed an argument to the function. The print_message() function requires one argument to be passed.

Modify the function call as shown below and confirm that the code runs correctly:

print_message("Hello")

Conclusion

After going through this tutorial you have all you need to understand why the “unexpected EOF while parsing” error occurs in Python.

You have also learned how to find at which line the error occurs and what you have to do to fix it.

Claudio Sabato - Codefather - Software Engineer and Programming Coach

I’m a Software Engineer and Programming Coach. I want to help you in your journey to become a Super Developer!


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