CASRB0036E Unexpected dfherdcv error: request=request-code result=result-code status=file-status

An unexpected error was returned from the conversion file I/O handler (dfherdcv).
System Action:
The file is closed (if it was open), and processing continues, if possible.
Resolution:
file-status may provide some insight into the cause of the problem. If not, contact Micro Focus Customer Support.
Module:
dfhpcupg
Destination:
Stdout and rdoupgrd.log