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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 | 226 | ZeroMemory() is not allowed for objects with protected members or inheritance | YI GOLD suggestionsReduce recursion and large local arrays, review allocation/release, batch history processing and check memory-operation results. MetaQuotes |
| MT5 · Compilation errors | 227 | Ambiguous call of the overloaded function (exact match of parameters for several overloads) | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT5 · Compilation errors | 228 | Variable name expected | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 229 | A reference cannot be declared in this place | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 230 | Already used as the enumeration name | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 232 | Class or structure expected | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 235 | Cannot call 'delete' operator to delete the array | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT5 · Compilation errors | 236 | Operator ' while' expected | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 237 | Operator 'delete' must have a pointer | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 238 | There is 'default' for this 'switch' already | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 239 | Syntax error | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 240 | Escape-sequence can occur only in strings (starts with '\') | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 241 | Array required - square bracket '[' does not apply to an array, or non arrays are passed as array parameters | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT5 · Compilation errors | 242 | Can not be initialized through the initialization sequence | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 243 | Import is not 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 | 244 | Optimizer error on the syntactic tree | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 245 | Declared too many structures (try to simplify the program) | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 246 | Conversion of the parameter is not allowed | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT5 · Compilation errors | 247 | Incorrect use of the 'delete' operator | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 248 | It's not allowed to declare a pointer to a reference | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 249 | It's not allowed to declare a reference to a reference | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 250 | It's not allowed to declare a pointer to a pointer | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 251 | Structure declaration in the list of parameter is not allowed | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT5 · Compilation errors | 252 | Invalid operation of typecasting | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 253 | A pointer can be declared only for a class or structure | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 256 | Undeclared identifier | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 257 | Executable code optimizer error | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 258 | Executable code generation error | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 260 | Invalid expression for the 'switch' operator | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 261 | Pool of string constants overfilled, simplify program | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 262 | Cannot convert to enumeration | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 263 | Do not use 'virtual' for data (members of a class or structure) | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 264 | Cannot call protected method of class | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 265 | Overridden virtual functions return a different type | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 266 | Class cannot be inherited from a structure | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 267 | Structure cannot be inherited from a class | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 268 | Constructor cannot be virtual ( virtual specifier is not allowed) | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 269 | Method of structure cannot be virtual | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 270 | Function must have a body | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 271 | Overloading of system functions (terminal functions) is prohibited | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
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