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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 · Compiler warnings | 45 | Difference between the signs of operands in the operations of comparison. Example: (char) c1> (uchar) c2 | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 46 | Problems with function importing - declaration of #import is required or import of functions is closed | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 47 | Too large description - extra characters will not be included in the executable file | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT4 · Compiler warnings | 48 | The number of indicator buffers declared is less than required | YI GOLD suggestionsVerify symbol, timeframe, indicator handle, BarsCalculated and copied element counts. Wait for data availability rather than filling missing prices with zeros. MetaQuotes |
| MT4 · Compiler warnings | 49 | No color to plot a graphical series in the indicator | YI GOLD suggestionsVerify symbol, timeframe, indicator handle, BarsCalculated and copied element counts. Wait for data availability rather than filling missing prices with zeros. MetaQuotes |
| MT4 · Compiler warnings | 50 | No graphical series to draw the indicator | YI GOLD suggestionsVerify symbol, timeframe, indicator handle, BarsCalculated and copied element counts. Wait for data availability rather than filling missing prices with zeros. MetaQuotes |
| MT4 · Compiler warnings | 51 | 'OnStart' handler function not found in the script | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 52 | 'OnStart' handler function is defined with wrong parameters | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT4 · Compiler warnings | 53 | 'OnStart' function can be defined only in a script | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 54 | 'OnInit' function is defined with wrong parameters | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT4 · Compiler warnings | 55 | 'OnInit' function is not used in scripts | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 56 | 'OnDeinit' function is defined with wrong parameters | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT4 · Compiler warnings | 57 | 'OnDeinit' function is not used in scripts | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 58 | Two 'OnCalculate' functions are defined. OnCalculate () at one price array will be used | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT4 · Compiler warnings | 59 | Overfilling detected when calculating a complex integer constant | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 60 | Probably, the variable is not initialized . | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 61 | This declaration makes it impossible to refer to the local variable declared on the specified line | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 62 | This declaration makes it impossible to refer to the global variable declared on the specified line | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 63 | Cannot be used for static allocated array | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT4 · Compiler warnings | 64 | This variable declaration hides predefined variable | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 65 | The value of the expression is always true / false | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 66 | Using a variable or bool type expression in mathematical operations is unsafe | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 67 | The result of applying the unary minus operator to an unsigned ulong type is undefined | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 68 | The version specified in the #property version property is unacceptable for the Market section; the correct format of #property version id "XXX.YYY" | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 69 | Empty controlled statement found | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 70 | Invalid function return type or incorrect parameters during declaration of the event handler function | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT4 · Compiler warnings | 71 | An implicit cast of structures to one type is required | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 72 | This declaration makes direct access to the member of a class declared in the specified string impossible. Access will be possible only with the scope resolution operation :: | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 73 | Binary constant is too big, high-order digits will be truncated | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 74 | Parameter in the method of the inherited class has a different const modifier, the derived function has overloaded the parent function | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT4 · Compiler warnings | 75 | Negative or too large shift value in shift bitwise operation , execution result is undefined | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 76 | Function must return a value | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 77 | void function returns a value | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 78 | Not all control paths return a value | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 79 | Expressions are not allowed on a global scope | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 80 | Check operator precedence for possible error; use parentheses to clarify precedence | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 81 | Two OnCalCulate() are defined. OHLC version will be used | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 82 | Struct has no members, size assigned to 1 byte | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 83 | Return value of the function should be checked | YI GOLD suggestionsReview the warning line, types, initialization and return values in MetaEditor. Evaluate runtime consequences and correct the warning even when compilation succeeds. MetaQuotes |
| MT4 · Compiler warnings | 84 | Resource indicator is compiled for debugging. That slows down the performance. Please recompile the indicator to increase performance | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
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