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MT4 / MT5 Error Codes & Trading Tools
Search official trade, runtime and compilation codes and warnings. Calculate risk using actual contract specifications.
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Official error code lookup
1171 matching records
| Platform / category | Code / constant | Official meaning | Troubleshooting |
|---|---|---|---|
| MT4 · Compilation errors | 143 | Use of "void" type is unacceptable | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 144 | No pair for ")" or "]", i.e. "(or" [ " is absent | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 145 | No pair for "(or" [ ", i.e. ") "or"] " is absent | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 146 | Incorrect array size | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT4 · Compilation errors | 147 | Too many parameters (> 64) | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT4 · Compilation errors | 149 | This token is not expected here | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 150 | Invalid use of operation (invalid operands) | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 151 | Expression of void type not 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 | 152 | Operator 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 | 153 | Misuse of break | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 154 | Semicolon ";" 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 | 155 | Comma "," 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 | 156 | Must be a class type, not struct | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 157 | Expression 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 | 158 | "non HEX character" found in HEX or too long number (number of digits> 511) | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 159 | String-constant has more than 65534 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 | 160 | Function definition is unacceptable here | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 161 | Unexpected end of program | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 162 | Forward declaration is prohibited for structures | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 163 | Function with this name is already defined and has another return type | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 164 | Function with this name is already defined and has a different set of parameters | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT4 · Compilation errors | 165 | Function with this name is already defined and implemented | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 166 | Function overload for this call was not found | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 167 | Function with a return value of void type cannot return a value | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 168 | Function is not defined | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 170 | Value 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 | 171 | In case expression only integer constants are valid | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 172 | The value of case in this switch is already 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 | 173 | Integer 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 | 174 | In #import expression file name is expected | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Compilation errors | 175 | Expressions are not allowed on global level | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 176 | Omitted parenthesis ")" before ";" | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 177 | To the left of equality sign a variable 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 | 178 | The result of expression is 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 | 179 | Declaring of variables is not allowed in case | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 180 | Implicit conversion from a string to a number | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 181 | Implicit conversion of a number to a string | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 182 | Ambiguous call of an overloaded function (several overloads fit) | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 183 | Illegal else without proper if | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 184 | Invalid case or default without a switch | 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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