PK15277: MSG DFS301A UNABLE TO OPEN DDNAME OF A RECOVERED EMPTY VSAM DATA SET

APAR status

• Closed as program error.

Error description

• Unable to image copy several IMS databases after a recovery was
  done with DRF 2.1, because the dataset is empty and appears to
  be a native VSAM and not an IMS database.
  Example for 1 database:
  
  
  
  
  IEC161I 072-053,IMSD048I,IBMHPIC GCLOG,GCLOG,,,#IMSI1.GMIS.GCLOG
  
  The dataset was empty, but the ACB for the dataset indicated
  that it was being opened for input only;
  
   DFS301A    UNABLE TO OPEN DDNAME GCLOG
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users with Database Recovery Facility    *
  *                 Version 2 Release 1 installed.               *
  ****************************************************************
  * PROBLEM DESCRIPTION: Users may receive MSGIEC161I 072-053    *
  *                      and MSGDFS301A UNABLE TO OPEN DDNAME    *
  *                      while attempting to take an image copy  *
  *                      or perform other post-recovery          *
  *                      operations.                             *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  Users may be unable to take an image copy or perform other
  post-recovery operations on SHISAM or KSDS type databases after
  a DRF recovery.  When users delete and redefine a KSDS data set
  it becomes an empty native VSAM file with the ACB (access method
  control block) set to be opened for input only.  If the data set
  is originally empty and no updates took place against the data
  set, DRF does not prep the empty VSAM file to an IMS database.
  After DRF completes, it remains as an empty native VSAM file.
  

Problem conclusion

• AIDS: RIDS/UTIL RIDS/DBS DBS/UTIL
    DEP: NONE
    GEN:
  
  *** END IMS KEYWORDS ***
  FRXIVCN0 is changed to prepare an empty KSDS for update
  processing.  In order for an empty native VSAM file to be an
  IMS database, a dummy record must be written out to it by DRF
  and then deleted.  Following this process, the ACB for the data
  set will indicate that it can be opened for update as opposed
  to input only.
  
  FRXIICA is changed to refrain from saving a copy of the image
  copy record key when no image copy record exists for that block.
  FRXIOCN0, FRXIOSM0, FRXIVSM0, and FRXIVCN0 are recompiled for
  this change.
  

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:

  UK10964

Modules/Macros

• FRXIICA  FRXIOCN0 FRXIOSM0 FRXIVCN0 FRXIVSM0
  

Fix information

• Fixed component name

  IMS DB RECOVERY

• Fixed component ID

  5655I4400

Applicable component levels

• R210 PSY UK10964

     UP06/01/27 P F601