PH41265: ABEND0C4 IN MODULE DFHFCDR DUE TO CORRUPTED MAINLINE REGISTERS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• MESSAGE:   DFHFC0001 An abend (code 0C4/AKEA) has occurred at
  offset X'16BA' in module DFHFCDR.
  .
  The customer is experiencing abend0C4's during startup of their
  regions after upgrading to CICS 5.6. It looks like the mainline
  registers are corrupted (all zeroes) so when they are restored,
  the module takes an abend0C4 when trying to use these registers.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: DFHFC0001 / Abend0C4 when application   *
  *                      issues EXEC CICS DELETE with            *
  *                      KEYLENGTH(0) to a CFDT.                 *
  ****************************************************************
  A CICS application issues EXEC CICS DELETE with KEYLENGTH(0)
  to a Coupling Facility Data Table (CFDT) file.
  IBM documentation says, "Do not specify a zero value for
  KEYLENGTH because the results are unpredictable."
  In CICS TS 5.6, KEYLENGTH(0) can cause a DFHFC0001 / Abend0C4
  in DFHFCDR due to a storage overlay of a register save area.
  

Problem conclusion

• DFHFCDR has been modified to prevent an 0C4 if an application
  specifies KEYLENGTH(0).
  IBM documentation continues to say "Do not specify a zero value
  for KEYLENGTH because the results are unpredictable."
  

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:

  UI78104

Modules/Macros

• DFHFCDR
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R300 PSY UI78104

     UP21/11/18 P F111

Fix is available

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