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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 |
|---|---|---|---|
| MT5 · 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 |
| MT5 · 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 |
| MT5 · 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 |
| MT5 · Runtime errors | 5270 ERR_NETSOCKET_INVALIDHANDLE | Invalid socket handle passed to function | 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 |
| MT5 · Runtime errors | 5271 ERR_NETSOCKET_TOO_MANY_OPENED | Too many open sockets (max 128) | 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 |
| MT5 · Runtime errors | 5272 ERR_NETSOCKET_CANNOT_CONNECT | Failed to connect to remote host | 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 |
| MT5 · Runtime errors | 5273 ERR_NETSOCKET_IO_ERROR | Failed to send/receive data from socket | 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 |
| MT5 · Runtime errors | 5274 ERR_NETSOCKET_HANDSHAKE_FAILED | Failed to establish secure connection (TLS Handshake) | 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 |
| MT5 · Runtime errors | 5275 ERR_NETSOCKET_NO_CERTIFICATE | No data on certificate protecting the connection | 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 |
| MT5 · Runtime errors | 5300 ERR_NOT_CUSTOM_SYMBOL | A custom symbol must be specified | 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 |
| MT5 · Runtime errors | 5301 ERR_CUSTOM_SYMBOL_WRONG_NAME | The name of the custom symbol is invalid. The symbol name can only contain Latin letters without punctuation, spaces or special characters (may only contain ".", "_", "&" and "#"). It is not recommended to use characters <, >, :, ", /,\, |, ?, *. | 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 |
| MT5 · Runtime errors | 5302 ERR_CUSTOM_SYMBOL_NAME_LONG | The name of the custom symbol is too long. The length of the symbol name must not exceed 32 characters including the ending 0 character | 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 |
| MT5 · Runtime errors | 5303 ERR_CUSTOM_SYMBOL_PATH_LONG | The path of the custom symbol is too long. The path length should not exceed 128 characters including "Custom\\", the symbol name, group separators and the ending 0 | 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 |
| MT5 · Runtime errors | 5304 ERR_CUSTOM_SYMBOL_EXIST | A custom symbol with the same name already exists | 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 |
| MT5 · Runtime errors | 5305 ERR_CUSTOM_SYMBOL_ERROR | Error occurred while creating, deleting or changing the custom symbol | 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 |
| MT5 · Runtime errors | 5306 ERR_CUSTOM_SYMBOL_SELECTED | You are trying to delete a custom symbol selected in Market Watch | 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 |
| MT5 · Runtime errors | 5307 ERR_CUSTOM_SYMBOL_PROPERTY_WRONG | An invalid custom symbol property | 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 |
| MT5 · Runtime errors | 5308 ERR_CUSTOM_SYMBOL_PARAMETER_ERROR | A wrong parameter while setting the property of a custom symbol | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT5 · Runtime errors | 5309 ERR_CUSTOM_SYMBOL_PARAMETER_LONG | A too long string parameter while setting the property of a custom symbol | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT5 · Runtime errors | 5310 ERR_CUSTOM_TICKS_WRONG_ORDER | Ticks in the array are not arranged in the order of time | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT5 · Runtime errors | 5400 ERR_CALENDAR_MORE_DATA | Array size is insufficient for receiving descriptions of all values | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT5 · Runtime errors | 5401 ERR_CALENDAR_TIMEOUT | Request time limit 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 |
| MT5 · Runtime errors | 5402 ERR_CALENDAR_NO_DATA | Country is not found | 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 |
| MT5 · Runtime errors | 5601 ERR_DATABASE_ERROR | Generic error | 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 |
| MT5 · Runtime errors | 5602 ERR_DATABASE_LOGIC | SQLite internal logic error | 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 |
| MT5 · Runtime errors | 5603 ERR_DATABASE_PERM | Access denied | 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 |
| MT5 · Runtime errors | 5604 ERR_DATABASE_ABORT | Callback routine requested abort | 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 |
| MT5 · Runtime errors | 5605 ERR_DATABASE_BUSY | Database file locked | YI GOLD suggestionsSerialize account requests, verify previous outcomes, reduce frequency and use bounded backoff. MetaQuotes |
| MT5 · Runtime errors | 5606 ERR_DATABASE_LOCKED | Database table locked | YI GOLD suggestionsSerialize account requests, verify previous outcomes, reduce frequency and use bounded backoff. MetaQuotes |
| MT5 · Runtime errors | 5607 ERR_DATABASE_NOMEM | Insufficient memory for completing operation | YI GOLD suggestionsReduce recursion and large local arrays, review allocation/release, batch history processing and check memory-operation results. MetaQuotes |
| MT5 · Runtime errors | 5608 ERR_DATABASE_READONLY | Attempt to write to readonly database | 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 |
| MT5 · Runtime errors | 5609 ERR_DATABASE_INTERRUPT | Operation terminated by sqlite3_interrupt() | 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 |
| MT5 · Runtime errors | 5610 ERR_DATABASE_IOERR | Disk I/O error | 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 |
| MT5 · Runtime errors | 5611 ERR_DATABASE_CORRUPT | Database disk image corrupted | 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 |
| MT5 · Runtime errors | 5612 ERR_DATABASE_NOTFOUND | Unknown operation code in sqlite3_file_control() | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT5 · Runtime errors | 5613 ERR_DATABASE_FULL | Insertion failed because database is full | 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 |
| MT5 · Runtime errors | 5614 ERR_DATABASE_CANTOPEN | Unable to open the database file | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT5 · Runtime errors | 5615 ERR_DATABASE_PROTOCOL | Database lock protocol error | 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 |
| MT5 · Runtime errors | 5616 ERR_DATABASE_EMPTY | Internal use only | 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 |
| MT5 · Runtime errors | 5617 ERR_DATABASE_SCHEMA | Database schema changed | 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 |
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