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 |
|---|---|---|---|
| MT5 · 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 |
| MT5 · 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 |
| MT5 · 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 |
| MT5 · 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 |
| MT5 · Compilation errors | 185 | Inappropriate use of ellipsis | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 186 | The initializing sequence has more elements than the initialized variable | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 187 | A constant for case 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 | 188 | A constant expression required | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 189 | A constant variable cannot be changed | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 190 | Closing bracket or a comma is expected (declaring array member) | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT5 · Compilation errors | 191 | Enumerator identifier already 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 | 192 | Enumeration cannot have access modifiers (const, extern, static) | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 193 | Enumeration member already declared with a different value | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 194 | There is a variable defined with the same 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 | 195 | There is a structure defined with the same 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 | 196 | Name of enumeration member 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 | 197 | Integer expression 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 | 198 | Division by zero in constant expression | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 199 | Wrong number of parameters in the function | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT5 · Compilation errors | 200 | Parameter by reference must be a variable | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT5 · Compilation errors | 201 | Variable of the same type to pass by reference 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 | 202 | A constant variable cannot be passed by a non-constant 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 | 203 | Requires a positive integer constant | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 204 | Failed to access protected class member | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 205 | Import already defined in another way | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 208 | Executable file not created | YI GOLD suggestionsCheck permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access. MetaQuotes |
| MT5 · Compilation errors | 209 | 'OnCalculate' entry point not found for 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 |
| MT5 · Compilation errors | 210 | The continue operation can be used only inside a loop | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 211 | Error accessing private (closed) class member | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 213 | Method of structure or class is not declared | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 214 | Error accessing private (closed) class method | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
| MT5 · Compilation errors | 216 | Copying of structures with objects is not allowed | YI GOLD suggestionsVerify chart ID, object existence and property types. Check creation/update results and avoid name collisions. MetaQuotes |
| MT5 · Compilation errors | 218 | Index out of array range | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT5 · Compilation errors | 219 | Array initialization in structure or class declaration not allowed | YI GOLD suggestionsCheck length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access. MetaQuotes |
| MT5 · Compilation errors | 220 | Class constructor cannot have parameters | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT5 · Compilation errors | 221 | Class destructor can not have parameters | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT5 · Compilation errors | 222 | Class method or structure with the same name and parameters have already been declared | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT5 · Compilation errors | 223 | Operand 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 | 224 | Class method or structure with the same name exists, but with different parameters (declaration!=implementation) | YI GOLD suggestionsCompare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context. MetaQuotes |
| MT5 · Compilation errors | 225 | Imported function is not described | YI GOLD suggestionsLocate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile. MetaQuotes |
Official meanings and YI GOLD suggestions are presented separately. References are verified during version builds; page visits do not fetch external sites.