Procedure

Determine the extent of the incorrect output.

Use the LISTCAT command as described in the chapter on functional command format in z/OS DFSMS Access Method Services Commands to obtain a complete listing of the catalog.
Use the IEHLIST program as described in z/OS DFSMSdfp Utilities to obtain a listing of the VTOC. This might be useful for diagnosing problems in managing DASD volume space or in using access method services commands.
Use the DIAGNOSE command as described in the chapter on functional command format in z/OS DFSMS Access Method Services Commands to determine whether a catalog structure is correct. Include any reason codes produced by DIAGNOSE in your search argument.
Example: If the reason code is 23, you would specify it as follows:
```
DIAGNOSE   RC23
```
Use the IDCAMS EXAMINE command as described in the chapter on functional command format in z/OS DFSMS Access Method Services Commands and the chapter on checking a VSAM key-sequenced data set cluster for structural errors in z/OS DFSMS Using Data Sets to determine whether the catalog being used has been damaged, and the nature of the damage.
If the output of these service aids (LISTCAT, IEHLIST, DIAGNOSE, or EXAMINE) indicates that the catalog is not damaged, inform the IBM Support Center if you call for assistance. If they indicate that the catalog is damaged, keep a copy of the output for possible use by the IBM Support Center. Be prepared to describe the type of catalog damage. You should attempt to recover the catalog and rerun the failing job to determine whether the problem is resolved.
See z/OS DFSMSdfp Diagnosis.