A fix is available
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