PK42116: ABEND0CB FABADA5 AT X'4FDC' RUNNING DEDB POINTER CHECKER

APAR status

• Closed as program error.

Error description

• ABENDS0CB FABADA5 at x'4FDC' running the DEDB Pointer Checker.
  The abend is due to a large number of IOVF's encountered. We
  currently cannot handle such a large number, which causes the
  IOVF free space analysis calculation to fail (and abend).
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All DEDB Pointer Checker users of High       *
  *                 Performance Fast Path Utilities FP Basic     *
  *                 Tools Version 2 Release 2 (FMID: H31A220).   *
  ****************************************************************
  * PROBLEM DESCRIPTION: IMS High Performance Utility FABADA5    *
  *                      failed with an abend S0CB (decimal      *
  *                      divide exception).                      *
  ****************************************************************
  * RECOMMENDATION: Apply the maintenance for this APAR.         *
  ****************************************************************
  IMS High Performance Utility FABADA5 failed with an abend S0CB
  (decimal divide exception) on the DP instruction in FABADA5.
  The abend happened during calculating the average of IOVF CI's
  used in the IOVF section of the DEDB Area Analysis report for
  Freespace Analysis.
  

Problem conclusion

• The cause of the abend was the overflow condition which had
  happened when a large number of IOVF CI (29,980) was divided by
  a small number of UOW (1).
  The divide has been held using 8bytes work field which is
  divided by 5 bytes field. In this case the heading 3 bytes are
  used for the quotient.
  Internally 29980 is used as 299800 (4 bytes decimal), so that
  the overflow condition happened on 3 bytes quotient field as a
  result of divide.
  As the maximum number of UOW is 32767, 3 bytes length field is
  enough for the value of UOW. The UOW field has been changed
  from 5 bytes to 3 bytes in this apar to avoid the overflow
  condition. The quotient field has changed from 3 bytes to 5
  bytes by this modification.
  
  The module FABADA5 has been reassembled.
  The macro DA#MDA51 has been modified to change UOW field length
  from 5 bytes to 3 bytes.
  The macro has been modified to add the modification history.
  The macro DA5PFSI0 and DA5PFSD0 has been modified to proceed
  the 5 bytes length quotient field.
  220Y
  DA#MDA51
  DA5MAIN0
  DA5PFSD0
  DA5PFSI0
  FABADA5
  

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:

  UK23744

Modules/Macros

•    DA#MDA51 DA5MAIN0 DA5PFSD0 DA5PFSI0 FABADA5
  

Fix information

• Fixed component name

  IMS HP FP UTILI

• Fixed component ID

  5655K9400

Applicable component levels

• R220 PSY UK23744

     UP07/04/06 P F704