A fix is available
APAR status
Closed as program error.
Error description
A tight loop occurs in IPI4PROC even when it is at the PH71877 maintenance level. The loop hits a few instructions between x'86C' and x'8BE' into IPI4PROC. looping
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: Users of IMS Performance Analyzer V4.5 * **************************************************************** * PROBLEM DESCRIPTION: Loop in IPI4PROC near +86C and +8BE * **************************************************************** An incorrect chain pointer occurred during transaction processing, processing, causing a loop. IPI4PROC is changed to detect the incorrect pointer and recover.
Problem conclusion
IPI4PROC is corrected such that the loop is avoided.
Temporary fix
Comments
APAR Information
APAR number
PH72840
Reported component name
IMS PERF ANALYZ
Reported component ID
5655E1500
Reported release
450
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2026-08-21
Closed date
2026-09-14
Last modified date
2026-10-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UO09384
Modules/Macros
IPI4PROC IPISAPAR
Fix information
Fixed component name
IMS PERF ANALYZ
Fixed component ID
5655E1500
Applicable component levels
R450 PSY UO09384
UP26/09/17 P F609
Fix is available
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Document Information
Modified date:
02 October 2026