Symptoms of the failure

Incorrect output failures can be identified by the following:

Expected output is missing.
Output is different than expected.
Output should not have been generated.
System indicates damage to the VTOC or VTOC index.
ISMF panel information or flow is erroneous.

Incorrect output can be the result of a previous failure and can often be difficult to analyze because the component affected might not be the one that caused the problem. Review previous messages, abends, console logs, or other system responses. They could indicate the source of the failure.