A service call was issued to obtain the list of requested data sets from the MVS™ system, but the service call was unsuccessful.
The LIST or NLST command is rejected.
Try the command again. If the problem persists, contact the system programmer for the FTP server system.
If necessary, re-create the problem with FTP server traces turned on. Locate the last occurrence of the trace message “list2: return code rc from gtlist.”. This trace message will contain the return code from the service call that was unsuccessful. Determine the cause and correct the problem.