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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 · Compilation errors | 401 | Inheritance from the class is impossible, since it is declared with the final specifier | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 402 | Cannot redefine a method declared with the final specifier | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 403 | The final specifier can be applied only to virtual functions | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 404 | The method marked by the override specifier actually does not override any base class function | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 405 | A specifier is not allowed in defining a function, but only in declaring | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 406 | Cannot cast the type to the specified one | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 407 | The type cannot be used for a resource variable | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT5 · Compilation errors | 408 | Error in the project file | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT5 · Compilation errors | 409 | Cannot be used as a union member | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 410 | Ambiguous choice for the name, the usage context should be explicitly defined | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 411 | The structure cannot be used from DLL | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 412 | Cannot call a function marked by the delete specifier | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 413 | MQL4 is not supported. To compile this program, use MetaEditor from your MetaTrader 4 installation folder | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Runtime errors | 0 ERR_SUCCESS | The operation completed successfully | YI GOLD suggestionsDo not treat this as a failure. Still check the function return value and operation state. MetaQuotes |
| MT5 · Runtime errors | 4001 ERR_INTERNAL_ERROR | Unexpected internal 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 | 4002 ERR_WRONG_INTERNAL_PARAMETER | Wrong parameter in the inner call of the client terminal function | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT5 · Runtime errors | 4003 ERR_INVALID_PARAMETER | Wrong parameter when calling the system function | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT5 · Runtime errors | 4004 ERR_NOT_ENOUGH_MEMORY | Not enough memory to perform the system function | YI GOLD suggestionsReduce recursion and large local arrays, review allocation/release, batch history processing and check memory-operation results. MetaQuotes |
| MT5 · Runtime errors | 4005 ERR_STRUCT_WITHOBJECTS_ORCLASS | The structure contains objects of strings and/or dynamic arrays and/or structure of such objects and/or classes | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT5 · Runtime errors | 4006 ERR_INVALID_ARRAY | Array of a wrong type, wrong size, or a damaged object of a dynamic array | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT5 · Runtime errors | 4007 ERR_ARRAY_RESIZE_ERROR | Not enough memory for the relocation of an array, or an attempt to change the size of a static array | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT5 · Runtime errors | 4008 ERR_STRING_RESIZE_ERROR | Not enough memory for the relocation of string | YI GOLD suggestionsReduce recursion and large local arrays, review allocation/release, batch history processing and check memory-operation results. MetaQuotes |
| MT5 · Runtime errors | 4009 ERR_NOTINITIALIZED_STRING | Not initialized string | 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 | 4010 ERR_INVALID_DATETIME | Invalid date and/or time | 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 | 4011 ERR_ARRAY_BAD_SIZE | Total amount of elements in the array cannot exceed 2147483647 | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT5 · Runtime errors | 4012 ERR_INVALID_POINTER | Wrong pointer | 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 | 4013 ERR_INVALID_POINTER_TYPE | Wrong type of pointer | 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 | 4014 ERR_FUNCTION_NOT_ALLOWED | Function is not allowed for call | 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 | 4015 ERR_RESOURCE_NAME_DUPLICATED | The names of the dynamic and the static resource match | 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 | 4016 ERR_RESOURCE_NOT_FOUND | Resource with this name has not been found in EX5 | 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 | 4017 ERR_RESOURCE_UNSUPPORTED_TYPE | Unsupported resource type or its size exceeds 16 Mb | 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 | 4018 ERR_RESOURCE_NAME_IS_TOO_LONG | The resource name exceeds 63 characters | 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 | 4019 ERR_MATH_OVERFLOW | Overflow occurred when calculating math 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 | 4020 ERR_SLEEP_ERROR | Out of test end date after calling Sleep() | 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 | 4022 ERR_PROGRAM_STOPPED | Test forcibly stopped from the outside. For example, optimization interrupted, visual testing window closed or testing agent stopped | 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 | 4023 ERR_INVALID_TYPE | Invalid type | 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 | 4024 ERR_INVALID_HANDLE | Invalid handle | 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 | 4025 ERR_TOO_MANY_OBJECTS | Object pool filled out | YI GOLD suggestionsVerify chart ID, object existence and property types. Check creation/update results and avoid name collisions. MetaQuotes |
| MT5 · Runtime errors | 4101 ERR_CHART_WRONG_ID | Wrong chart ID | YI GOLD suggestionsVerify symbol, timeframe, indicator handle, BarsCalculated and copied element counts. Wait for data availability rather than filling missing prices with zeros. MetaQuotes |
| MT5 · Runtime errors | 4102 ERR_CHART_NO_REPLY | Chart does not respond | YI GOLD suggestionsVerify symbol, timeframe, indicator handle, BarsCalculated and copied element counts. Wait for data availability rather than filling missing prices with zeros. MetaQuotes |
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