PH21261: S0C4 IN IGZXE32 OFFSET X'DC' ON MERGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• COBOL V6.2 program receives a s0c4 in IGZXE32 at offset x'DC'
  on an MVHHI instruction due to an invalid address in reg5.
  Problem only occurs when using NOBLOCKSET, which is the
  conventional merge technique.
  

Local fix

• Use BLOCKSET
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL V5 and later       *
  *                 releases compiling and running programs that *
  *                 contain MERGE statements, with the DFSORT    *
  *                 NOBLKSET option in effect.                   *
  ****************************************************************
  * PROBLEM DESCRIPTION: The BLKSET option was the default and   *
  *                      was recommended by DFSORT. The NOBLKSET *
  *                      option prevented DFSORT from using      *
  *                      newer algorithms, and caused it to use  *
  *                      the conventional method to do the       *
  *                      merge. Enterprise COBOL V5 and later    *
  *                      releases did not support the            *
  *                      conventional method.                    *
  ****************************************************************
  * RECOMMENDATION: Apply the PTF to obtain tolerate NOBLKSET    *
  *                 and the conventional merge method in         *
  *                 Enterprise COBOL V5+.                        *
  ****************************************************************
  Support for NOBLKSET was not available in the COBOL runtime.
  When DFSORT attempted to use the conventional merge method
  (caused by the NOBLKSET option setting), an address field
  containing COBOL runtime control block information was invalid.
  This led to a subsequent 0C4 abend in the COBOL runtime.
  

Problem conclusion

• The Migration Guide has been updated to provide information
  about the NOBLKSET usage scenario. Refer also to the Technical
  Note  for details (URL:
  https://www.ibm.com/support/pages/node/1171576 ).
  

Temporary fix

Comments

APAR Information

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

  PH20569

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

Modules/Macros

• IGZCEV4  IGZLLIBV IGZXAPI  IGZXCDA  IGZXD24  IGZXDMR  IGZXLPIO
  IGZXLPKA IGZXLPKB IGZXLPKC IGZXLPKD IGZXLPKE IGZXLPKF IGZXLPKG
  IGZXPK2
  

Fix information

• Fixed component name

  LE ENT COBOL LI

• Fixed component ID

  568819812

Applicable component levels

• R7B0 PSY UI67485

     UP20/01/24 P F001

• R7C0 PSY UI67486

     UP20/01/24 P F001

Fix is available

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