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PM89429: WMQ Z/OS: ABN=5C6-00C51196 IN CSQERWI1+00004EB2

A fix is available


You can track all active APARs for this component.


APAR status

  • Closed as program error.

Error description

  • An error occurred in a structure (in this case it was injected
    using the INJERROR utility).  During recovery, the following
    abend occurred:
    DUMP TITLE=CSQ3,ABN=5C6-00C51196,S=00000825,C=R3600.710.CFM -CS
    Reason 00C51196 was set when CSQERWI1 tried to update the
    version number of a retrieved entry from the UOW list header in
    the CSQ_ADMIN structure. The eUOW (unit of work control block)
    was deleted from underneath CSQERWI1 by the internal batch
    delete processing.
    Additional Keyword(s):
    ABEND5C6 ABENDS5C6 S5C6 S05C6 5C6 00C51196 CSQERWI1

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
    *                 Release 1 Modification 0.                    *
    * PROBLEM DESCRIPTION: When the queue manager reconnects to a  *
    *                      CF structure after a loss of            *
    *                      connectivity, abend 5C6-00C51196 is     *
    *                      issued.                                 *
    * RECOMMENDATION:                                              *
    The queue manager does some in-syncpoint work for a shared queue
    on CF structure S1 and commits it.
    Before the eUOWDs are cleared out (space limitation or backout
    processing), some more in-syncpoint work is done for a different
    CF structure S2. Before that unit of work is committed, the
    queue manager loses connectivity to the structure S2. When the
    queue manager reconnects, recovery is driven and CSQERWI1 reads
    the eUOWD entries for this queue manager.
    When it finds one, it is processed. As part of the processing,
    the structure number is verified. If there is a mismatch, for
    instance if the eUOWD is from the work that was done on S1, the
    eUOWD version change is undone. In this case, before the version
    change could be reversed, backout processing had removed the
    entry from the admin structure, causing the version reset call
    to fail with IxlRsnCodeNoEntry.
    This return code is unexpected and the queue manager abends with

Problem conclusion

  • The code was changed to tolerate the eUOWDs being deleted before
    the version numbers can be reset, preventing the abend from

Temporary fix


APAR Information

  • APAR number


  • Reported component name

    WMQ Z/OS V7

  • Reported component ID


  • Reported release


  • Status


  • PE




  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date


  • Closed date


  • Last modified date


  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:




Fix information

  • Fixed component name

    WMQ Z/OS V7

  • Fixed component ID


Applicable component levels

  • R100 PSY UK96901

       UP13/09/27 P F309

Fix is available

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Document Information

Modified date:
04 October 2013