A fix is available
APAR status
Closed as program error.
Error description
Route of fix for defect 299104 to correct ABEND5C6 00E60094 in CSQWVCOL
Local fix
Disable MQ MSTR internal trace
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM MQ for z/OS Version 9 * * Release 4 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: Users may experience an ABEND5C6 * * 00E60094 in CSQWVCOL when a job runs * * out of memory, typically during * * abnormal end-of-memory (EOM) * * processing. * **************************************************************** The RRS context manager allocates an execution block for a dynamic ASCE that does not include a pointer to the THTR storage block, which is required for 64-bit trace. This leads to a 5C6-00E60094 abend during EOM processing if GLOBAL trace is enabled.
Problem conclusion
The problem has been resolved by disabling 64-bit trace for the affected execution block in this scenario.
Temporary fix
Comments
APAR Information
APAR number
PH64904
Reported component name
IBM MQ Z/OS V9
Reported component ID
5655MQ900
Reported release
CD0
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2025-01-21
Closed date
2025-12-02
Last modified date
2026-02-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UO06040
Modules/Macros
CSQ3RRSM
Fix information
Fixed component name
IBM MQ Z/OS V9
Fixed component ID
5655MQ900
Applicable component levels
R400 PSY UO06040
UP26/01/10 P F601
Fix is available
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Document Information
Modified date:
01 February 2026