MT4 · Compilation errors
MT4 222 · Class method or structure with the same name and parameters have already been declared | YI GOLD
Official meaning
Class method or structure with the same name and parameters have already been declared
Possible causes · YI GOLD suggestions
Parameter types, counts or ranges do not match the function signature.
Troubleshooting · YI GOLD suggestions
Compare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context.