MT4 · Runtime errors
MT4 5021 · File cannot be rewritten | YI GOLD
ERR_FILE_CANNOT_REWRITE
Official meaning
File cannot be rewritten
Possible causes · YI GOLD suggestions
Paths, access modes, formats, handles or permissions do not meet requirements.
Troubleshooting · YI GOLD suggestions
Check permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access.