PK98850: ABEND0C4 RC4 DSNUULCA DURING UNLOAD DB2 ABENDS OVERLAY

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• 1. Took an image copy
  2. The table was versioned (Altered)
  3. The tablespace was REORGed
     Then all rows in the table became version 1 format.
     The image copy which was taken after the REORG had 'OLDEST
     VERSION = 0001'.
  4. MODIFY utility deleted all image copies with 'OLDEST
     VERSION = 0000'. Then the prime OBD was deleted.
  5. UNLOAD using the image copy in (1) cause 0c4 and overlay
  DB2OVRLAY/K
  

Local fix

• do not run Unload on an Image copy that no longer exists
  in SYSCOPY
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All DB2 9 for z/OS utility users of UNLOAD   *
  *                 from an image copy                           *
  ****************************************************************
  * PROBLEM DESCRIPTION: UNLOAD encountered ABEND0C4 RC00000004  *
  *                      in DSNUULCA + x'6E42' when unloading    *
  *                      from an image copy that no longer had   *
  *                      a SYSCOPY entry and was taken prior to  *
  *                      when versioning was active              *
  ****************************************************************
  * RECOMMENDATION: Apply corrective PTF when available          *
  ****************************************************************
  UNLOAD encountered ABENDS0C4 RC00000004 at DSNUULCA +x'6E42'
  in the following scenario:
   1. Image copy taken prior to when versioning was active
   2. ALTERed table and INSERTed data to add versioning
   3. REORGed table space to consolidate versions
   4. MODIFY RECOVERY to delete SYSCOPY entry for image copy
      taken in Step 1, which also deletes OBD prime information
      for version 0.
   5. UNLOAD from image copy taken from Step 1
  
  UNLOAD was not able to resolve the OBD information for version 0
  records, because it had been deleted due to the MODIFY
  RECOVERY.  UNLOAD should not try to unload a row if the version
  information for the row being unloaded is not found.
  
  Additional keywords: FROMCOPY FROMCOPYDDN
  Additional symptoms: ABEND04E RC00E20028 at DSNSVSTK +x'01F0'
  

Problem conclusion

• UNLOAD from image copy code has been modified to issue message
  MSGDSNU1239I - 'VERSION version OBDREC WAS NOT FOUND IN OBID
  obid' when the OBD information for a version 0 row
  is not available in the image copy or OBD.
  
  This APAR/PTF updated the Messages and Codes book to describe
  existing message DSNU1239I as follows:
  
  DSNU1239I
  csect-name - VERSION version-number OBDREC WAS NOT FOUND IN
  OBID obid
  
  Explanation
  The version information for the record being unloaded is
  unavailable in the OBD and/or the system pages from the
  image copy are not available.
  
  System action
  The record in error will not be unloaded to the output data
  set. The UNLOAD utility continues until the total number of
  records in error reaches the value specified by the MAXERR
  option (the default is 1).
  
  If the total number of records reaches the MAXERR value, the
  UNLOAD utility issues the DSNU1219I message and terminates
  with the return code 8.
  
  Problem determination
  This message is issued when the version information for a
  record being unloaded from an image copy is not available
  in the OBD or the system pages found in the image copy.
  This could occur if the SYSTEM PAGEs are not available in
  the image copy or if MODIFY RECOVERY had been run to
  delete the version 0 OBD information
  
  User response
  UNLOAD from an image copy requires that the image copy
  data set was taken with the SYSTEMPAGES YES option on the
  COPY utility statement.  UNLOAD needs the system pages to
  unload versioned data.
  
  If the DDL including ALTERs of the table at the time the
  image copy was taken is available, users are recommended
  to do the following to rebuild OBD information:
  
  1. Recreate the table to the same state it was at the
  time the image copy was taken.
  2. DSN1COPY with OBDIXLAT may need to be used to update
  the dbid, psid, obid information in the image copy to
  match with the newly recreated table.
  3. UNLOAD from the updated image copy.
  
  Severity
  4 (Warning)
  

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:

  UK52508

Modules/Macros

• DSNUULCA
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• R910 PSY UK52508

     UP09/12/18 P F912

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.