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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 |
|---|---|---|---|
| MT5 · 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 |
| MT5 · 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 |
| MT5 · 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 |
| MT5 · 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 |
| MT5 · 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 |
| MT5 · 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 |
| MT5 · 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 |
| MT5 · 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 |
| MT5 · Compiler warnings | 85 | Too great character code in the string, must be in the range 0 to 65535 | 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 |
| MT5 · Compiler warnings | 86 | Unrecognized character in the string | 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 |
| MT5 · Compiler warnings | 87 | No indicator window property (setting the display in the main window or a subwindow) is defined. Property #property indicator_chart_window is applied | 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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