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VM66925: Z/VM 7.4 CP: FIX PACK - FEATURE 03 FIX 07

A fix is available

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APAR status

  • Closed as program error.

Error description

  • This is Feature Pack 03 Fix Pack 01 for z/VM 7.4. It contains
    fixes for the following problems:
    
    1. OSH device stuck attached to SYSTEM after VSWITCH SWITCHOVER
    fails
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: Any z/VM system using VSWITCH with real      *
    *                 devices.                                     *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    ****************************************************************
    * RECOMMENDATION: APPLY PTF                                    *
    ****************************************************************
    OSH device stuck attached to SYSTEM after VSWITCH SWITCHOVER
    fails
    ------------------------------------------------------------
    After deleting and redefining a VSWITCH using OSH devices and
    then performing a SWITCHOVER, connectivity is not restored and
    one of the devices remains attached to SYSTEM while no longer
    being associated with a VSWITCH.
    

Problem conclusion

  • OSH device stuck attached to SYSTEM after VSWITCH SWITCHOVER
    fails
    ------------------------------------------------------------
    A problem was found in a function that connects the structures
    for a VSWITCH uplink OSH device and corrected. A similar problem
    was corrected in the OSD path to avoid potential issues there.
    

Temporary fix

Comments

APAR Information

  • APAR number

    VM66925

  • Reported component name

    VM CP CP

  • Reported component ID

    568411202

  • Reported release

    740

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2026-03-03

  • Closed date

    2026-03-06

  • Last modified date

    2026-03-24

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

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

    UM90594

Modules/Macros

  • HCPCPE   HCPVLC   HCPVLE   7VMCPR40
    

Fix information

  • Fixed component name

    VM CP CP

  • Fixed component ID

    568411202

Applicable component levels

  • R740 PSY UM90594

       UP26/03/09 P 7404

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

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Document Information

Modified date:
24 March 2026