PM44358: ABEND0C4 ON CWBG TRANSACTION

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• On CWBG ABEND0C4 ABENDS0C4 S0C4 occured just after EXEC CICS
  ASSIGN command from DFHWBGB. During the ASSIGN command the CWBG
  was suspended on the SMLOCK. This allow other task to run and
  used the CSA registers save area. When the SMLOCK is obtained
  and the CWBG resumed, the registers were restore for the CSA and
  hence the abend 0C4. DFHWBGB register 13 should have point to
  DFHEIB control block before the EXEC CICS ASSIGN command was
  issued but instead was pointing to the CSA.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: DFHAP0001 AN ABEND (CODE 0C4/AKEA)      *
  *                      HAS OCCURRED AT OFFSET X'FFFFFFFF'      *
  *                      IN MODULE DFHWBGB.                      *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  DFHWBGB issues an EXEC CICS ASSIGN command using the CSA
  register save area instead of the exec layer save area.
  
  During the processing of the ASSIGN command the task gets
  suspended on the SMLOCK.  While suspended the CSA register
  save area gets validly used by another task.
  
  When the ASSIGN command completes the registers are
  restored from the CSA.  These register values are no
  longer valid for this point in the execution of DFHWBGB
  and this eventually leads to an 0C4 abend.
  

Problem conclusion

• DFHWBGB has been changed to use the correct save area for EXEC
  CICS calls.
  

Temporary fix

• 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:

  PM50151 UK73334 UK73336

Modules/Macros

•    DFHWBGB
  

Fix information

• Fixed component name

  CICSTS V3 Z/OS

• Fixed component ID

  5655M1500

Applicable component levels

• R400 PSY UK73334

     UP11/11/08 P F111

• R500 PSY UK73336

     UP11/11/08 P F111

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.