DWW0560W

A record with a zero sequence number is found when switching logs and reading backward. Record nn2 on log dddd2 precedes record nn1 on log dddd1. Processing continues.

A label record with a zero sequence number was found, and the record before it on the log (nn1) does not have the maximum sequence number (232-1). Record nn1 is the last record on log dddd1, and the zero record is the first record on log dddd2. Some possible causes are:
  • The sequence number was reset to zero by CICS®. If you do not have a journal archive control data set (JACD), CICS® resets the sequence number at every cold start and warm start. CICS® VR functions correctly in this situation.
  • A log data set is omitted when specifying the logs and the next log started with a zero record.
  • A zero sequence number occurred because the JACD is damaged or lost. CICS® VR functions correctly in this situation.
  • A log was skipped during archiving, and the next log started with a record with a zero sequence number.
  • A log had data other than log records.

This message is issued if command SEQCHKL RESETSEQUENCE(WARNING) is specified, or if WARNING is specified in the sequence checking secondary window.

CICS® VR continues the backout.

  • Batch–If you are using a JACD, find out why the zero sequence number occurred. If the JACD is damaged or lost, no action is required. If a log was skipped during archiving, rerun CICS® VR after archiving the log. In other cases, check the contents of the log to see whether all records needed for backout are present.

    If you omitted a log, archive this log and rerun CICS® VR.

    Remember to restore the VSAM data sets from the backup copies before you rerun CICS® VR.

  • Online–If you are using a JACD, find out why the zero sequence number occurred. If the JACD is damaged or lost, no action is required. If a log was skipped during archiving, rerun CICS® VR after archiving the log. In other cases, check the contents of the log to see whether all records needed for backout are present.

    If you omitted a log, archive this log and rerun CICS® VR.

    Remember to restore the VSAM data sets from the backup copies before you resubmit the recovery job.