See the CTF tracing for a more through understanding of why this may have occurred. (File doesn't exist on disk, etc. ) Will
typically have a 9/0xx trace indicating the COBOL RTS System Error Code that describes the reason for failing to open.
Resolution:
Correct the environment or logic error that caused the issue. PL/I RTS #fileio ctf tracing may provide you with additional
information as to the root cause.