PI90652: ABEND0C4 as the COBOL v5+ run-time fails to recover properly from references to an SVC DELETEd module

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When a COBOL v5+ module is unloaded via the DELETE SVC, the
  run-time doesn't get a chance to clean up its related resources,
  meaning that it continues to believe the module is present, and
  may later try to reference what was the module's storage. The
  error shunt used to detect bad memory references in this
  situation is not working as intended, and surfaces an ABEND0C4.
  

Local fix

• Use the COBOL CANCEL statement, or the IGZCXCC (COBOL
  Call/Cancel Routine) module, documented in the Vendor Interfaces
  manual, to delete modules.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL 5.2 and later      *
  *                 releases compiling and running programs      *
  *                 that are being called and then deleted by    *
  *                 SVC DELETE, and subsequently being called    *
  *                 again.                                       *
  *                                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: The program terminates abnormally with  *
  *                      ABEND S0C4 in IGZCEV4.                  *
  *                                                              *
  ****************************************************************
  * RECOMMENDATION: Apply the provided PTF.                      *
  *                                                              *
  ****************************************************************
  When a called COBOL program is deleted by SVC DELETE, the
  information and related resources about the COBOL program still
  remain in runtime library control blocks. Later, when there is
  a reference to the deleted storage, the invalid address causes
  ABEND S0C4 in IGZCEV4.
  

Problem conclusion

• Logic in the COBOL runtime has been added to detect and
  tolerate references to program storage that are deleted.
  

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:

  PI91272 PI92328

Modules/Macros

• IGZXLPKA
  

Fix information

• Fixed component name

  LE ENT COBOL LI

• Fixed component ID

  568819812

Applicable component levels

• R7A0 PSY UI52550

     UP17/12/19 P F712

• R790 PSY UI52551

     UP17/12/19 P F712

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.