PM68588: FM/IMS DOES ALLOW TWO USERS TO UPDATE SAME SEGMENT SIMULTANEOUSLY.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Two users have read same segment in updating purppose.
  Then first user updates the segment.
  Second user can update same segment without re-reading it.
   .
  FM/IMS checks before update that the data is still same than
  when we initially read the segment but this checking is done
  only in the beginning of segment.
  If the update goes further from the key ,we don't detect it.
  This is integrity problem.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All FM/IMS Edit users updating database      *
  *                 segments that have a length greater than     *
  *                 256 bytes.                                   *
  ****************************************************************
  * PROBLEM DESCRIPTION: Before issuing the REPL call that       *
  *                      replaces the segment you edited on the  *
  *                      IMS data panel, FM/IMS checks that the  *
  *                      segment has not been updated by another *
  *                      user after the data on your screen was  *
  *                      last refreshed. If it has, FM/IMS does  *
  *                      not issue the REPL call. Instead, it    *
  *                      displays the Segment Update/Delete      *
  *                      Warning popup and then, after you press *
  *                      the Exit or Cancel key, refreshes the   *
  *                      data displayed on your screen.          *
  *                      The above is a description of what      *
  *                      FM/IMS should be doing. However, when   *
  *                      the length of the segment you edit      *
  *                      exceeeds 256 bytes, FM/IMS does not     *
  *                      always detect that it has been updated  *
  *                      by another user and, when it doesn't,   *
  *                      the segment is replaced and the update  *
  *                      by the other user is lost.              *
  ****************************************************************
  * RECOMMENDATION: Apply the provided PTF.                      *
  ****************************************************************
  

Problem conclusion

• FM/IMS has been modified to correct this problem.
  

Temporary fix

Comments

APAR Information

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

  PM57554

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

Modules/Macros

• FMN1LVL
  

Fix information

• Fixed component name

  FILE MANAGER Z/

• Fixed component ID

  5655W6800

Applicable component levels

• RC14 PSY UK81591

     UP12/09/13 P F209

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.