PK63221: WHEN CODING ESMEXITS=INSTLN IN THE SIT IT CAUSES AN ABEND 0C4 IN MODULE DFHXSRC AT OFFSET X'3146'. 08/03/25 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Customer migrated from CICS 2.2 to CICS 3.2. When coding
  ESMEXITS=INSTLN in CICS TS 3.2 is causes an DFHXS0001 abend 0C4
  at offset X'3146' in module DFHXSRC. This problem is caused by
  the code added in apar PK54362 (UK32394) due to the task running
  on the domain initialization task which does not have an XM
  block associated with it. The pointer to the XM block is zeroes.
  When CICS tries to access the bridge token, we end up picking
  an address out of lowcore. CICS then program check trying to
  access an indicator out of the bridge transaction area.
  
  Additional Keyword(s) and Symptom(s):
  KIXREVSVR
  

Local fix

• Remove ESMEXITS=INSTLN from the SIT
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All.                                         *
  ****************************************************************
  * PROBLEM DESCRIPTION: DFHXS0001 abend0C4 at offset X'3146'    *
  *                      in DFHXSRC during startup when          *
  *                      ESMEXITS=INSTLN is specified in         *
  *                      the SIT.                                *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  After application of ptf UK32394  CICS may abend0C4 during
  startup if ESMEXITS=INSTLN is specified in the SIT. The code
  added by PK54362 is being driven in error when the running
  transaction does not have an XM transaction block, as would be
  the case for a domain initialization task.
  The code attempts to address the BRTA from an address taken
  from the transaction block, but the address of the transaction
  block is 0. Whether we get an abend0C4 as a result of this
  depends on the contents of storage at low core.
  It will depend on the contents of X'00000170' for CICS
  Transaction Server Version 3 Release 2 and at X'00000158' for
  CICS Transaction Server Version 3 Release 1.
  Additional keywords: MSGDFHXS0001 DFHXS0001 abendakea XS0001
                       S0C4 0C4 abendS0C4
  

Problem conclusion

• UK32393 UK32394
  DFHXSRC has been altered so that none of the code to set up
  INSTLN terminal attributes is executed if the running
  transaction does not have an associated XM transaction
  block.
  

Temporary fix

•             *********
              * HIPER *
              *********
  FIX AVAILABLE BY PTF ONLY
  

Comments

APAR Information

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

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

  UK37839 UK37840

Modules/Macros

•    DESXSRC  DFHXSRC
  

Fix information

• Fixed component name

  CICSTS V3 Z/OS

• Fixed component ID

  5655M1500

Applicable component levels

• R400 PSY UK37839

     UP08/07/08 P F807 ®

• R500 PSY UK37840

     UP08/07/08 P F807 ®

Fix is available

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