Node.js Error Codes

Symbolic error codes (ERR_*) thrown by the Node.js runtime. These appear as the code property on Error objects and identify the specific cause more precisely than the message string.

96 codes

• ERR_AMBIGUOUS_ARGUMENT Ambiguous argument
• ERR_ARG_NOT_ITERABLE Argument is not iterable
• ERR_ASYNC_CALLBACK Async callback required
• ERR_BUFFER_OUT_OF_BOUNDS Buffer out of bounds
• ERR_BUFFER_TOO_LARGE Buffer too large
• ERR_CHILD_PROCESS_IPC_REQUIRED Child process IPC required
• ERR_CHILD_PROCESS_STDIO_MAXBUFFER Child process stdio maxBuffer exceeded
• ERR_CRYPTO_INCOMPATIBLE_KEY Incompatible crypto key
• ERR_CRYPTO_INVALID_DIGEST Invalid crypto digest
• ERR_CRYPTO_INVALID_KEY_OBJECT_TYPE Invalid key object type
• ERR_CRYPTO_SCRYPT_INVALID_PARAMETER Invalid scrypt parameter
• ERR_DIR_CLOSED Directory handle closed
• ERR_DNS_SET_SERVERS_FAILED Failed to set DNS servers
• ERR_ENCODING_INVALID_ENCODED_DATA Invalid encoded data
• ERR_ENCODING_NOT_SUPPORTED Encoding not supported
• ERR_EVENT_RECURSION Event recursion
• ERR_FALSY_VALUE_REJECTION Falsy value rejection
• ERR_FEATURE_UNAVAILABLE_ON_PLATFORM Feature unavailable on platform
• ERR_FS_FILE_TOO_LARGE File too large
• ERR_FS_INVALID_SYMLINK_TYPE Invalid symlink type
• ERR_HTTP_HEADERS_SENT Headers already sent
• ERR_HTTP_INVALID_HEADER_VALUE Invalid HTTP header value
• ERR_HTTP_INVALID_STATUS_CODE Invalid HTTP status code
• ERR_HTTP_TRAILER_INVALID Invalid trailer
• ERR_HTTP2_CONNECT_AUTHORITY HTTP/2 CONNECT missing authority
• ERR_HTTP2_INVALID_HEADER_VALUE Invalid HTTP/2 header value
• ERR_HTTP2_INVALID_STREAM Invalid HTTP/2 stream
• ERR_HTTP2_STREAM_CANCEL HTTP/2 stream cancelled
• ERR_HTTP2_TOO_MANY_INVALID_FRAMES Too many invalid HTTP/2 frames
• ERR_ILLEGAL_CONSTRUCTOR Illegal constructor
• ERR_INCOMPATIBLE_OPTION_PAIR Incompatible option pair
• ERR_INVALID_ARG_TYPE Invalid argument type
• ERR_INVALID_ARG_VALUE Invalid argument value
• ERR_INVALID_BUFFER_SIZE Invalid buffer size
• ERR_INVALID_CALLBACK Invalid callback
• ERR_INVALID_IP_ADDRESS Invalid IP address
• ERR_INVALID_MODULE_SPECIFIER Invalid module specifier
• ERR_INVALID_PACKAGE_CONFIG Invalid package config
• ERR_INVALID_SYNC_FORK_INPUT Invalid sync fork input
• ERR_INVALID_THIS Invalid this
• ERR_INVALID_URI Invalid URI
• ERR_METHOD_NOT_IMPLEMENTED Method not implemented
• ERR_MISSING_ARGS Missing required arguments
• ERR_MODULE_NOT_FOUND Module not found
• ERR_MULTIPLE_CALLBACK Multiple callback
• ERR_NAPI_CONS_FUNCTION N-API constructor must be a function
• ERR_NO_CRYPTO Node.js built without crypto
• ERR_NO_ICU Node.js built without ICU
• ERR_OPERATION_FAILED Operation failed
• ERR_OUT_OF_RANGE Value out of range
• ERR_PACKAGE_IMPORT_NOT_EXPORTED Package import not exported
• ERR_PACKAGE_PATH_NOT_EXPORTED Package path not exported
• ERR_REQUIRE_ASYNC_MODULE Cannot require async module
• ERR_REQUIRE_ESM Cannot require ES module
• ERR_SERVER_ALREADY_LISTEN Server already listening
• ERR_SERVER_NOT_RUNNING Server not running
• ERR_SOCKET_ALREADY_BOUND Socket already bound
• ERR_SOCKET_BAD_BUFFER_SIZE Invalid socket buffer size
• ERR_SOCKET_DGRAM_NOT_RUNNING Datagram socket not running
• ERR_STREAM_ALREADY_FINISHED Stream already finished
• ERR_STREAM_CANNOT_PIPE Cannot pipe to a non-writable stream
• ERR_STREAM_DESTROYED Stream destroyed
• ERR_STREAM_NULL_VALUES Null values not allowed in non-object mode
• ERR_STREAM_PUSH_AFTER_EOF Cannot push after EOF
• ERR_STREAM_UNSHIFT_AFTER_END_EVENT Cannot unshift after end
• ERR_STREAM_WRITE_AFTER_END Write after end
• ERR_STRING_TOO_LONG String too long
• ERR_SYNTHETIC Synthetic error
• ERR_SYSTEM_ERROR System error
• ERR_TLS_CERT_ALTNAME_INVALID TLS certificate alt name invalid
• ERR_TLS_HANDSHAKE_TIMEOUT TLS handshake timeout
• ERR_TLS_INVALID_PROTOCOL_VERSION Invalid TLS protocol version
• ERR_TLS_PROTOCOL_VERSION_CONFLICT TLS protocol version conflict
• ERR_TLS_RENEGOTIATION_DISABLED TLS renegotiation disabled
• ERR_TLS_SESSION_ATTACK TLS session attack
• ERR_TRANSFORM_ALREADY_TRANSFORMING Transform already transforming
• ERR_TRANSFORM_WITH_LENGTH_0 Transform ended with buffered data
• ERR_TTY_INIT_FAILED TTY initialisation failed
• ERR_UNAVAILABLE_DURING_EXIT Unavailable during exit
• ERR_UNHANDLED_ERROR Unhandled error event
• ERR_UNKNOWN_CREDENTIAL Unknown credential
• ERR_UNKNOWN_ENCODING Unknown encoding
• ERR_UNKNOWN_FILE_EXTENSION Unknown file extension
• ERR_UNKNOWN_SIGNAL Unknown signal
• ERR_UNSUPPORTED_DIR_IMPORT Unsupported directory import
• ERR_USE_AFTER_CLOSE Use after close
• ERR_VM_DYNAMIC_IMPORT_CALLBACK_MISSING VM dynamic import callback missing
• ERR_VM_MODULE_ALREADY_LINKED VM module already linked
• ERR_VM_MODULE_CANNOT_CREATE_CACHED_DATA Cannot create cached data for module
• ERR_VM_MODULE_DIFFERENT_CONTEXT VM module different context
• ERR_VM_MODULE_NOT_MODULE VM module not a module
• ERR_WASI_ALREADY_STARTED WASI already started
• ERR_WORKER_OUT_OF_MEMORY Worker out of memory
• ERR_WORKER_PATH Invalid worker path
• ERR_WORKER_UNSERIALIZABLE_ERROR Unserializable worker error
• ERR_WORKER_UNSUPPORTED_OPERATION Unsupported worker operation