IBM Support

IT34686: A failure to downgrade the appliance firmware to an earlier level reports AMQ6546E instead of a meaningful error

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APAR status

  • Closed as program error.

Error description

  • When attempting to downgrade the MQ appliance firmware from or to a 9.1 firmware level, if an error is
    encountered during the downgrade - for example, if HA services
    cannot be suspended - the following error is reported:
    AMQ6546E: An internal IBM MQ Appliance error has occurred.
    % Unable to prepare the MQ Appliance for downgrade.
    A meaningful error message is expected instead of the AMQ6546E

Local fix

Problem summary

  • ****************************************************************
    Users of IBM MQ Appliance 9.2
    Platforms affected:
    If an error occurred while processing a firmwar downgrade, a
    logic error meant that a specific error message based on the
    internal error code was not correctly reported to the user, and
    a generic AMQ6546E message was written to the console instead.

Problem conclusion

  • The MQ Appliance firmware downgrade logic has been corrected to
    display a specific message based on the internal error code, if
    one exits, should the downgrade procedure fail.
    The fix is targeted for delivery in the following PTFs:
    Version    Maintenance Level
    v9.2 LTS
    v9.x CD    9.2.1
    The latest available maintenance can be obtained from
    'WebSphere MQ Recommended Fixes'
    If the maintenance level is not yet available information on
    its planned availability can be found in 'WebSphere MQ
    Planned Maintenance Release Dates'

Temporary fix


APAR Information

  • APAR number


  • Reported component name

    MQ APPL M2002 V

  • 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

    MQ APPL M2002 V

  • Fixed component ID


Applicable component levels

[{"Type":"MASTER","Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SS5K6E","label":"IBM MQ Appliance"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"All Versions"}]

Document Information

Modified date:
07 July 2021