MT4 · Compilation errors
MT4 277 · Missed default value for the parameter (specific declaration of default parameters) | YI GOLD
Official meaning
Missed default value for the parameter (specific declaration of default parameters)
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.