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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 · Compilation errors | 362 | Ambiguous parameter in function template (several parameter types can be applied) | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT4 · Compilation errors | 363 | Unable to determine the parameter type, by which the function template argument should be normalized | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT4 · Compilation errors | 364 | Incorrect number of parameters in the function template | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT4 · Compilation errors | 365 | Function template cannot be virtual | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 366 | Function templates cannot be exported | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 367 | Function templates cannot be imported | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 368 | Structures containing the objects are not allowed | YI GOLD suggestionsVerify chart ID, object existence and property types. Check creation/update results and avoid name collisions. MetaQuotes |
| MT4 · Compilation errors | 369 | String arrays and structures containing the objects are not allowed | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT4 · Compilation errors | 370 | A static class/structure member must be explicitly initialized | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 371 | Compiler limitation: the string cannot contain more than 65 535 characters | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 372 | Inconsistent #ifdef/#endif | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 373 | Object of class cannot be returned, copy constructor not found | YI GOLD suggestionsVerify chart ID, object existence and property types. Check creation/update results and avoid name collisions. MetaQuotes |
| MT4 · Compilation errors | 374 | Non-static members and methods cannot be used | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 375 | OnTesterInit() impossible to use without OnTesterDeinit() | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 376 | Redefinition of formal parameter '%s' | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT4 · Compilation errors | 377 | Macro __FUNCSIG__ and __FUNCTION__ cannot appear outside of a function body | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 378 | Invalid returned type. For example, this error will be produced for functions imported from DLL that return structure or pointer. | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 379 | Template usage error | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 380 | Not used | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 381 | Illegal syntax when declaring pure virtual function, only "=NULL" or "=0" are allowed | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 382 | Only virtual functions can be declared with the pure-specifier ("=NULL" or "=0") | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 383 | Abstract class cannot be instantiated | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 384 | A pointer to a user-defined type should be applied as a target type for dynamic casting using the dynamic_cast operator | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 385 | "Pointer to function" type is expected | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 386 | Pointers to methods are not supported | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 387 | Error — cannot define the type of a pointer to function | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 388 | Type cast is not available due to private inheritance | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 389 | A variable with const modifier should be initialized during declaration | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Runtime errors | 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 · Runtime errors | 1 ERR_NO_RESULT | No error returned, but the result is unknown | 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 | 2 ERR_COMMON_ERROR | Common 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 |
| MT4 · Runtime errors | 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 · Runtime errors | 4 ERR_SERVER_BUSY | Trade server is busy | YI GOLD suggestionsSerialize account requests, verify previous outcomes, reduce frequency and use bounded backoff. MetaQuotes |
| MT4 · Runtime errors | 5 ERR_OLD_VERSION | Old version of the client terminal | 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 | 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 · Runtime errors | 7 ERR_NOT_ENOUGH_RIGHTS | Not enough rights | 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 | 8 ERR_TOO_FREQUENT_REQUESTS | Too frequent requests | YI GOLD suggestionsSerialize account requests, verify previous outcomes, reduce frequency and use bounded backoff. MetaQuotes |
| MT4 · Runtime errors | 9 ERR_MALFUNCTIONAL_TRADE | Malfunctional trade operation | 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 | 64 ERR_ACCOUNT_DISABLED | Account disabled | 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 | 65 ERR_INVALID_ACCOUNT | Invalid account | 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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