PH60162: ABEND 0C1 IN CSQBLECS WHEN A COBOL APPLICATION EXECUTES CALL 'MQSETMP'

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Abend 0C1 occurs in CSQBLECS when a COBOL application executes
  CALL 'MQSETMP'.
  
  The S0C1 abend is occurring due to a branch to low core because
  the pointer to the LE C runtime library vector table CEECAAEDCV
  is zero. CSQBLECS has code to try and detect when the
  environment isn't C, by checking a word field at
  CEECAAMEMBR->+0x3C. If this field is zero then CEEFETCH is used
  instead of using an address in the C library vector table.
  
  The problem is a bug in the logic which CSQBLECS uses to access
  the field. This bug results in the code instead inspecting the
  word at the current save area +0x3C. The value in this field
  will be unreliable and could change for unrelated reasons. This
  problem has already been fixed at MQ V931 and later releases.
  .
  Additional symptoms and keywords:
  ABEND0C1 ABENDS0C1 S00C1
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 3 Modification 0                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: An 0C1 abend can occur when calling     *
  *                      message property APIs from a COBOL      *
  *                      application                             *
  ****************************************************************
  CSQBLECS used the wrong base register when accessing the LE
  member list, resulting in the incorrect address for CEECAAMEMBR
  being used, which in some circumstances would later result in a
  incorrect branch resulting in an 0C1 abend.
  

Problem conclusion

• CSQBLECS has been corrected to use the correct base register for
  accessing LE member list
  

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:

  UI99195

Modules/Macros

• CSQBLECS
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R300 PSY UI99195

     UP25/01/07 P F501

Fix is available

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