PH48585: DFHPA0001 ABEND 0C4/AKEA IN MODULE DFHPAIT DURING STARTUP

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When trying to run module DFHPAIT during startup, it abends
  0C4/AKEA at offset X'1D2'.  Reviewing the module shows that, at
  this offset, it is trying to read the TAGHDR from the PA Anchor
  Block +X'BC', expecting to either find X'FFFFFFFF' or a valid
  pointer to the region tagging file.  However, during startup,
  this field does not appear to be populated either way,
  containing X'40404040', meaning that DFHPAIT attempts to use the
  word of blanks as a valid address in the code, leading to an 0C4
  abend.
  .
  Additional keywords: Abend0c4 DFHPAIT
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS Users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Abend 0C4 in DFHPAIT at CICS startup    *
  *                      when invoking CPSM in PLT.              *
  ****************************************************************
  It is possible to get an abend 0C4 at CICS startup when using a
  PLT program which has issued an EXEC CICS INQUIRE HEALTHCHECK.
  The PA anchor block is initialised to '40404040'x. The PLT
  processing occurs before any cicstags.yaml file is read and set
  the PA anchor block to either 'FFFFFFFF'x or a valid address.
  Code in DFHPAIT tests the cics_tags_addr for region health
  checks but uses '40404040'x as an address which causes the
  program check in DFHPAIT as this address has not been GETMAINed
  by the address space.
  

Problem conclusion

• DFHPAIT has been changed to check for '40404040'x and
  '00000000'x before checking the health of the region.
  

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:

  UI82403

Modules/Macros

• DFHPAIT
  

Fix information

• Fixed component name

  CICS TS Z/OS V6

• Fixed component ID

  5655YA100

Applicable component levels

• R400 PSY UI82403

     UP22/09/15 P F209

Fix is available

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