DWW0460W A record with a zero sequence number is found when switching logs and reading forward. Record nn1 on log dddd1 precedes record nn2 on log dddd2. Processing continues.

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A label record with a zero sequence number was found, and the record before it (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 for this message 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 was omitted when specifying the logs in the ALLOCATE statement, 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 contained 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.

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CICS VR continues the recovery.

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  • Batch–If the sequence number was reset to zero because you are not using a JACD, no action is required.

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

    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 recovery are present.

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

  • Online–If the sequence number was reset to zero because you are not using a JACD, no action is required.

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

    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 recovery are present.

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