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MT4 / MT5 Error Codes & Trading Tools
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Official error code lookup
1171 matching records
| Platform / category | Code / constant | Official meaning | Troubleshooting |
|---|---|---|---|
| MT4 · Runtime errors | 5006 ERR_FILE_CANNOT_DELETE | Cannot delete file | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5007 ERR_FILE_INVALID_HANDLE | Invalid file handle (file closed or was not opened) | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5008 ERR_FILE_WRONG_HANDLE | Wrong file handle (handle index is out of handle table) | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT4 · Runtime errors | 5009 ERR_FILE_NOT_TOWRITE | File must be opened with FILE_WRITE flag | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5010 ERR_FILE_NOT_TOREAD | File must be opened with FILE_READ flag | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5011 ERR_FILE_NOT_BIN | File must be opened with FILE_BIN flag | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5012 ERR_FILE_NOT_TXT | File must be opened with FILE_TXT flag | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5013 ERR_FILE_NOT_TXTORCSV | File must be opened with FILE_TXT or FILE_CSV flag | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5014 ERR_FILE_NOT_CSV | File must be opened with FILE_CSV flag | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5015 ERR_FILE_READ_ERROR | File read error | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5016 ERR_FILE_WRITE_ERROR | File write error | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5017 ERR_FILE_BIN_STRINGSIZE | String size must be specified for binary file | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5018 ERR_FILE_INCOMPATIBLE | Incompatible file (for string arrays-TXT, for others-BIN) | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT4 · Runtime errors | 5019 ERR_FILE_IS_DIRECTORY | File is directory not file | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5020 ERR_FILE_NOT_EXIST | File does not exist | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5021 ERR_FILE_CANNOT_REWRITE | File cannot be rewritten | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5022 ERR_FILE_WRONG_DIRECTORYNAME | Wrong directory name | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5023 ERR_FILE_DIRECTORY_NOT_EXIST | Directory does not exist | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5024 ERR_FILE_NOT_DIRECTORY | Specified file is not directory | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5025 ERR_FILE_CANNOT_DELETE_DIRECTORY | Cannot delete directory | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5026 ERR_FILE_CANNOT_CLEAN_DIRECTORY | Cannot clean directory | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5027 ERR_FILE_ARRAYRESIZE_ERROR | Array resize error | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT4 · Runtime errors | 5028 ERR_FILE_STRINGRESIZE_ERROR | String resize error | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Runtime errors | 5029 ERR_FILE_STRUCT_WITH_OBJECTS | Structure contains strings or dynamic arrays | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT4 · Runtime errors | 5200 ERR_WEBREQUEST_INVALID_ADDRESS | Invalid URL | YI GOLD suggestionsInspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description. MetaQuotes |
| MT4 · Runtime errors | 5201 ERR_WEBREQUEST_CONNECT_FAILED | Failed to connect to specified URL | YI GOLD suggestionsInspect connectivity, logs and request time. Verify actual order status before bounded retries with backoff to avoid duplicate exposure after a timeout. MetaQuotes |
| MT4 · Runtime errors | 5202 ERR_WEBREQUEST_TIMEOUT | Timeout exceeded | YI GOLD suggestionsInspect connectivity, logs and request time. Verify actual order status before bounded retries with backoff to avoid duplicate exposure after a timeout. MetaQuotes |
| MT4 · Runtime errors | 5203 ERR_WEBREQUEST_REQUEST_FAILED | HTTP request failed | YI GOLD suggestionsInspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description. MetaQuotes |
| MT4 · Runtime errors | 65536 ERR_USER_ERROR_FIRST | User defined errors start with this code | YI GOLD suggestionsInspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description. MetaQuotes |
| MT4 · Trade return codes | 0 ERR_NO_ERROR | No error returned | YI GOLD suggestionsDo not treat this as a failure. Still check the function return value and operation state. MetaQuotes |
| MT4 · Trade return codes | 1 ERR_NO_RESULT | No error returned, but the result is unknown | YI GOLD suggestionsCheck permissions, sessions, symbol specifications, quotes and request parameters. Reproduce in a demo account. Do not retry rejected requests indefinitely. MetaQuotes |
| MT4 · Trade return codes | 2 ERR_COMMON_ERROR | Common error | YI GOLD suggestionsCheck permissions, sessions, symbol specifications, quotes and request parameters. Reproduce in a demo account. Do not retry rejected requests indefinitely. MetaQuotes |
| MT4 · Trade return codes | 3 ERR_INVALID_TRADE_PARAMETERS | Invalid trade parameters | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT4 · Trade return codes | 4 ERR_SERVER_BUSY | Trade server is busy | YI GOLD suggestionsSerialize account requests, verify previous outcomes, reduce frequency and use bounded backoff. MetaQuotes |
| MT4 · Trade return codes | 5 ERR_OLD_VERSION | Old version of the client terminal | YI GOLD suggestionsCheck permissions, sessions, symbol specifications, quotes and request parameters. Reproduce in a demo account. Do not retry rejected requests indefinitely. MetaQuotes |
| MT4 · Trade return codes | 6 ERR_NO_CONNECTION | No connection with trade server | YI GOLD suggestionsInspect connectivity, logs and request time. Verify actual order status before bounded retries with backoff to avoid duplicate exposure after a timeout. MetaQuotes |
| MT4 · Trade return codes | 7 ERR_NOT_ENOUGH_RIGHTS | Not enough rights | YI GOLD suggestionsCheck permissions, sessions, symbol specifications, quotes and request parameters. Reproduce in a demo account. Do not retry rejected requests indefinitely. MetaQuotes |
| MT4 · Trade return codes | 8 ERR_TOO_FREQUENT_REQUESTS | Too frequent requests | YI GOLD suggestionsSerialize account requests, verify previous outcomes, reduce frequency and use bounded backoff. MetaQuotes |
| MT4 · Trade return codes | 9 ERR_MALFUNCTIONAL_TRADE | Malfunctional trade operation | YI GOLD suggestionsCheck permissions, sessions, symbol specifications, quotes and request parameters. Reproduce in a demo account. Do not retry rejected requests indefinitely. MetaQuotes |
| MT4 · Trade return codes | 64 ERR_ACCOUNT_DISABLED | Account disabled | YI GOLD suggestionsCheck permissions, sessions, symbol specifications, quotes and request parameters. Reproduce in a demo account. Do not retry rejected requests indefinitely. MetaQuotes |
Official meanings and YI GOLD suggestions are presented separately. References are verified during version builds; page visits do not fetch external sites.