MT4 · Runtime errors
MT4 4102 · Too many opened files | YI GOLD
ERR_TOO_MANY_OPENED_FILES
Official meaning
Too many opened files
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.