PI27182: DFHSR0001 0C4/AKEA) OFFSET X'2BD4' IN PROGRAM DFHEPC. DFHSR0622 ATTEMPT TO OVERWRITE THE ECDSA

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Your CICS region issues the following messages:
  .
  DFHSR0622 An attempt to overwrite the ECDSA has caused the
   abend which follows
  DFHSR0001 An abend (code 0C4/AKEA) has occurred at
   offset X'00002BD4' in program DFHEPC.
  .
  Following an abend in a remote program, an XPCTA exit program
  sets a RESUME address requesting that execution branch to that
  address in USER key. DFHEPC tries to do a DFHDSAT CHANGE_MODE
  but the current automatic storage for this module is in CICS
  key so the 0C4 occurs.
  .
  Additional Symptom(s) Search Keyword(s):
  KIXREVxxx  RTRYCICS
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: DFHSR0622 An attempt to overwrite the   *
  *                      ECDSA caused message DFHSR0001.         *
  *                      An abend (code 0C4/AKEA) has occurred   *
  *                      at offset X'00002BD4' in program        *
  *                      DFHEPC.                                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  User program PROG1 links to a remote program PROG2 which returns
  an abend. After DFHEPC creates the abend record it invokes exit
  XPCTA and XPCTA returns a retry address, and requests a
  switch to user key. Control returns back to DFHEPC.
  DFHEPC switches to user key, and then issues a CHANGE_MODE to
  ensure it is on the right TCB. This attempts to update CICS
  key storage while executing in user key, and so a
  protection exception (0C4) occurs.
  .
  Additional keywords: msgDFHSR0622 SR0622 msgDFHSR0001 SR0001
  S0C4 abendS0C4 abend0C4 PCUE_BRANCH_EXECKEY x2BD4
  

Problem conclusion

• DFHEPC has been changed to do change mode before switch
  execution key to user key.
  

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:

  PI30475 UI24119

Modules/Macros

• DFHEPC
  

Fix information

• Fixed component name

  CICS TS Z/OS V4

• Fixed component ID

  5655S9700

Applicable component levels

• R700 PSY UI24119

     UP15/01/07 P F501

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.