MT4 · Runtime errors
MT4 4051 · Invalid function parameter value | YI GOLD
ERR_INVALID_FUNCTION_PARAMVALUE
Official meaning
Invalid function parameter value
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.