If the TTOC base is missing, AUDIT generates for each CDD found:
- A TTOC entry flagged valid if the BCDS
contains a data set record referring to a backup version record for
the current position on the tape;
- A TTOC entry flagged invalid if the BCDS
contains a data set record for the CDD, but none of the backup version
records refers to the current position on the tape.
If no CDD record is found on the tape, AUDIT reports condition 134.