PK41501: ABEND0C1 AT DFHZSDA, R300, +34C

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Abend0C1 was detected at +34C in DFHZSDA when it ran in CICS
  system task TCP. This caused DFHSR0601, msgDFHSR0601, SR0601,
  termination against this CICS region.
  .
  This abend resulted from an invalid change of AMODE. DFHZSDA
  issued a VTAM SEND macro and made it into VTAM in amode31 but
  VTAM returned with amode24. Invalid address was thus generated
  and caused abend0c1.
  .
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: MSGDFHSR0601 after ABENDS0C4 in         *
  *                      DFHZSDA.                                *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The TCP task is in the middle of a VTAM macro which has used
  CSAOSRSA as a register save area. The TCP task is running on the
  QR TCB. In parallel with this, a J8 TCB is running through
  DFHSMVP processing a GETMAIN request under a JVM. CICS is
  running short on region storage so DFHSMVP suspends waiting for
  another JVM to release some storage. Around the suspend, the
  DFHKEDSI macro is used to start and stop purge protection. When
  DFHSMVP is resumed, the DFHKEDSI macro changes R13 to address
  the CSA rather than DFHSMVP's savearea.
  DFHSMVP then proceeds to issue a VSMLIST macro which uses R13
  as a savearea. This corrupts CSAOSRSA.
  The corrupted CSAOSRSA leads to a program check on the TCP task
  which causes CICS to terminate with DFHSR0601, but other
  unpredictable results may occur.
  
  ADDITIONAL KEYWORDS :- 0C4 S0C4 ABEND0C4 ABENDS0C4 SR0601
  CSZOSRSA CSA DFHZRST 0C1 abend0C1 abendS0C1 S0C1 SAVEWORDS
  

Problem conclusion

• DFHSMVP has been changed to ensure that R13 addresses
  its savearea after issuing DFHKEDSI macros.
  

Temporary fix

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

Comments

APAR Information

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

  PK36143

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

  UK25648

Modules/Macros

•    DFHSMVP
  

Fix information

• Fixed component name

  CICSTS 3.1 Z/OS

• Fixed component ID

  5655M1500

Applicable component levels

• R400 PSY UK25648

     UP07/06/07 P F706

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.