PH28983: DFHMN0002 X'0D0D' IN MODULE DFHMNAC AFTER CEMT SET PROGRAM OPERATION COMMAND

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• CICS issued a series of DFHMN0002 0D0D errors:
  
  DFHMN0002 A severe error (code X'0D0D') has occurred
   in module DFHMNAC.
  
  These were followed by a program check, and then the
  QR TCB went into a loop while running under the CSNE
  transaction.
  
  The problems occurred after a CEMT SET PROGRAM
  OPERATION(aaaaaaaa) NEW ALL command was issued.
  
  The DFHMN0002 0D0D errors are occurring when DFHMNAC calls
  DFHMNAD for SET_APP_CONTEXT, while running under a system
  task. System tasks don't have an ADCB (Associated Data Control
  Block to hold application context data).
  
  
  The CEMT SET PROGRAM OPERATION (aaaaaaaa) NEW ALL command
  caused all non-DFH programs to have an application context.
  
  This command caused problems for system transactions like:
  
  - COIR whose initial program is  EYU9XLOP. (The PPTE for
    EYU9XLOP includes a PPTE64 extension with this context data).
  
  - CSNE who invoked a URM (DFHZNEP) that did EXEC CICS LINK
    to a program that had context data.
  
  In addition, the exception trace entry for MN 0D0D did not
  format correctly:
  
  MN 0D0D ** POINT_ID NOT RECOGNIZED **
  
  Also, the parameter list that DFHMNAC uses to call DFHMNAD
  for function SET_APP_CONTEXT is reused by DFHMNAC when it
  calls DFHMEME for the DFHMN0002 0D0D. If possible, the
  parameter lists should be split so that the call to DFHMEME
  does not overlay the response from DFHMNAD.
  
  Additional Symptom(s) Search Keywords:  KIXREVxxx
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: DFHMN0002 X'0D0D' in DFHMNAC after a    *
  *                      CEMT SET PROGRAM OPERATION targets      *
  *                      program EYUXL09, COIR is running as     *
  *                      a system task.                          *
  ****************************************************************
  1.From CICS 5.4, the CPSM programs run as system tasks and so
  do not have an Association Data Control Block ( ADCB ). DFHMNAC
  should not be called to update association data for these.
  
  2.MNAC trace point 0D0D is not formatted.
  
  3.The call to message processing overlays the PLIST used to
  call DFHMNAD so making debugging more difficult.
  

Problem conclusion

• DFHEIQSP is changed to check for programs beginning EYU and halt
  association data processing.
  
  The reason shown on the CEMT command response screen is changed
  from 'PROGRAM BEGINS WITH DFH' to 'PROGRAM BEGINS DFH OR EYU'.
  
  
  In addition the DFHMNAC trace point 0D0D is now formatted
     MN 0D0D MNAC  *EXC* - UNEXPECTED MNAD ERROR
  and the PLIST used for the call to DFHMNAD will be visible in
  the dump.
  
  
  The CICS Transaction Server for z/OS V5.4 V5.5 & V5.6 Knowledge
  Center will be updated as follows:
  
  In System Commands SET PROGRAM options OPERATION the following
  bullet point:
  
  The PROGRAM resource is a CICS program, that is, it has a name
  beginning "DFH".
  
  has 'or "EYU"' appended to the end.
  
  
  In CEMT SET commands CEMT SET PROGRAM options OPERATION the
  following bullet point:
  
  The program resource is a CICS program (program resources that
  begin with DFH).
  
  has 'or "EYU"' appended to the end.
  
  
  The CICS Transaction Server for z/OS V5.4 Knowledge Center will
  be updated as follows:
  
  In 'Using the SET PROGRAM OPERATION command to experiment with
  application context' at the following bullet point:
  
  You cannot use the OPERATION option on a PROGRAM resource that
  has a name beginning "DFH".
  
  has 'or "EYU" appended to the end. Also EYU will be added to the
  next sentence after the DFH.
  

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:

  UI72784 UI72785 UI72786

Modules/Macros

• DFHEIQSP DFHEMT55 DFHMNAC  DFHMNTRI
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R100 PSY UI72786

     UP20/11/28 P F011

• R200 PSY UI72785

     UP20/11/28 P F011

• R300 PSY UI72784

     UP20/11/28 P F011

Fix is available

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