PM75701: DDIR1CHA LEFT SET ON FIRST DMB IN ACBLIB WHEN ACBLIB OLC FAILS DUE TO INCORRECT IMS RELEASE LEVEL IN INACTIVE ACBLIB DFS0651W

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Customer inadvertently attempted an ACLIB OLC with an incorrect
  IMS release level of members in the INACTIVE ACBLIB.
  DFSRMDM0 COMPARE call finds the first member ( a DEDB DMB )
  has differing timestamps, and sets DDIR1CHA and DDIR1DMB.
  Later the INSERT CHANGE call does detect that the INACTIVE
  member is at the wrong IMS release level and aborts the OLC,
  before creating the CHANGE list entry.
  DFS3496W is issued and OLC aborted. The DFSRMDM0 abort process
  works off the CHANGE list and this DMB isn't in it so DDIR1CHA
  and DDIR1DMB are never reset. The DMB shows up in subseqent
  OLCs as changing although in fact of course it is not.
  Later an FMTLIB OLC is done while a lot of PSBs were rescheduled
  for unrelated reasons and DFS0651W RC14 is issued and schedule
  fails. There is no way to reset the flags short of cycling IMS.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: IMS V11 users of ACBLIB online change        *
  ****************************************************************
  * PROBLEM DESCRIPTION: An online change prepare command        *
  *                      was issued with the wrong level         *
  *                      ACBLIB and fails with message           *
  *                      DFS3496W for a DMB, leaving the         *
  *                      database marked as being affected by    *
  *                      online change, which causes later       *
  *                      PSB schedules to fail with DFS0651W,    *
  *                      if another online change is in          *
  *                      progress.                               *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  A /MODIFY PREPARE ACBLIB command failed with
  DFS3496W DMB XXXXXXXX IN INACTIVE ACBLIB NOT COMPATIBLE WITH
  IMS LEVEL, because an IMS version 12 ACBLIB was used.
  Much later, a FMTLIB online change was initiated while
  MPPs were recycled and lots of PSB schedule activity was
  initiated.  PSB scheduling failed for many PSBs with
  DFS0651W ERROR 14 READING PSB YYYYYYYY DBD XXXXXXXX,
  because database XXXXXXXX was still marked as being
  online changed from the previous ACBLIB online change
  prepare command that failed, even though it wasn't
  being online changed.
  

Problem conclusion

• GEN:
  KEYWORDS:
  
  *** END IMS KEYWORDS ***
  DFSRMDM0 is corrected to reset bits indicating the database
  is being online changed, for the case where message
  DFS3496W is issued, in case there are no DDIRs on the
  change list.  Online change abort only cleans up DDIRs
  on the change list, so it can't be relied upon to
  cleanup DDIRs that weren't yet put on the change list
  when an error occurred.
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

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

  PM75787 UK83454

Modules/Macros

•    DFSRMDM0
  

Fix information

• Fixed component name

  IMS V11

• Fixed component ID

  5635A0200

Applicable component levels

• R101 PSY UK83454

     UP12/11/21 P F211

Fix is available

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