PI94885: DFHFC0001 ABEND 0C4/AKEA AT X'D99C' IN DFHFCFS WHEN OPENING BDAM FILE AFTER MIGRATING TO CICS/TS 5.4

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The problem occurs when trying to open a BDAM file. After the
  0C4 the BDAM file's status is OPEN and it works normally.
  .
  The 0C4 occurs on an EXECUTE RELATIVE LONG (EXRL) instruction
  which tries to execute a STORE instruction in DFHFCFS. The
  registers that the instruction uses takes us to Key0 storage,
  thus the 0C4. This is in the base code for CICS/TS 5.4 and is
  different from CICS/TS 5.3
  .
  The code would be expected to be executing the EXRL against a
  MVC instruction, in which case the value being passed in would
  represent the length to be moved. In this case the EXRL is
  incorrectly addressing a store instruction, so the value in the
  register ends up being used as an index register on the store.
  .
  Additional Symptom(s) Search Keyword(s):  S0C4, DFHFCFS, BDAM,
  XFCSREQC
  KIXREVACC
  

Local fix

• Disable XFCSREQC global user exit
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Abend0C4 in DFHFCFS when an EXRL        *
  *                      instruction tries to execute a          *
  *                      ST instruction.                         *
  ****************************************************************
  * RECOMMENDATION: .                                            *
  ****************************************************************
  An attempt is made to open a CICS BDAM file when
  CICS has an active XFCSREQC Global User Exit.
  DFHFCFS tries to make a copy of the BDAM DCB to pass to the
  exit using an EXRL instruction to execute an MVC instruction,
  but an error causes the EXRL to execute a STORE instruction
  by mistake. This results in an 0C4 abend in DFHFCFS.
  
  Additional keywords: DFHFC0001 AKEA E3004E000071
                       E300 4E00 0071 abends0c4
  

Problem conclusion

• DFHFCFS has been changed to execute an MVC instruction
  correctly.
  

Temporary fix

Comments

APAR Information

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

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

  UI54545

Modules/Macros

• DFHFCFS
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R100 PSY UI54545

     UP18/03/20 P F803

Fix is available

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