Position & Risk
Size exposure using equity, stop distance and actual specifications.
MT4 / MT5 Error Codes & Trading Tools
Search official trade, runtime and compilation codes and warnings. Calculate risk using actual contract specifications.
Margin & Value
Estimate margin, tick value and price-move value.
Open calculator
Compound & Drawdown
A mathematical scenario, not a forecast of strategy returns.
Open calculator
Calculations run locally in your browser. Inputs are not uploaded or saved. Terminal and broker margin rules apply; estimates exclude slippage, commission and swap.
Official error code lookup
1171 matching records
| Platform / category | Code / constant | Official meaning | Troubleshooting |
|---|---|---|---|
| MT4 · Compilation errors | 100 | File reading error | 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 | 101 | Error of opening an *. EX4 for writing | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 103 | Not enough free memory to complete compilation | YI GOLD suggestionsReduce recursion and large local arrays, review allocation/release, batch history processing and check memory-operation results. MetaQuotes |
| MT4 · Compilation errors | 104 | Empty syntactic unit unrecognized by compiler | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 105 | Incorrect file name in #include | 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 | 106 | Error accessing a file in #include (probably the file does not exist) | 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 | 108 | Inappropriate name for #define | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 109 | Unknown command of preprocessor (valid #include, #define, #property, #import) | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 110 | Symbol unknown to compiler | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 111 | Function not implemented (description is present, but no 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 | 112 | Double quote (") omitted | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 113 | Opening angle bracket (<) or double quote (") omitted | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 114 | Single quote (') omitted | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 115 | Closing angle bracket ">" omitted | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 116 | Type not specified in declaration | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 117 | No return operator or return is found not in all branches of the implementation | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 118 | Opening bracket of call parameters was expected | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT4 · Compilation errors | 119 | Error writing EX4 | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 120 | Invalid access to an array | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT4 · Compilation errors | 121 | The function is not of void type and the return operator must 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 | 122 | Incorrect declaration of the destructor | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 123 | Colon ":" is missing | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 124 | Variable is already declared | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 125 | Variable with such identifier already declared | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 126 | Variable name is too long (> 250 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 | 127 | Structure with such identifier already 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 | 128 | Structure 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 | 129 | Structure member with the same name already 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 | 130 | No such structure member | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 131 | Breached pairing of brackets | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 132 | Opening parenthesis "(" 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 | 133 | Unbalanced braces (no "}") | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 134 | Difficult to compile (too much branching, internal stack levels are overfilled) | YI GOLD suggestionsReduce recursion and large local arrays, review allocation/release, batch history processing and check memory-operation results. MetaQuotes |
| MT4 · Compilation errors | 135 | Error of file opening for reading | 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 | 136 | Not enough memory to download the source file into memory | YI GOLD suggestionsReduce recursion and large local arrays, review allocation/release, batch history processing and check memory-operation results. MetaQuotes |
| MT4 · Compilation errors | 137 | 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 | 138 | Reference cannot be 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 | 140 | Assignment expected (appears at declaration) | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT4 · Compilation errors | 141 | Opening brace "{" 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 | 142 | Parameter can be a dynamic array only | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
Official meanings and YI GOLD suggestions are presented separately. References are verified during version builds; page visits do not fetch external sites.