MT5 · Runtime errors
MT5 5040 · Damaged parameter of string type | YI GOLD
ERR_WRONG_STRING_PARAMETER
Official meaning
Damaged parameter of string type
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.