PK57343: CHECK IF THE DATA SET EXISTS BEFORE ALLOCATING IT.

APAR status

• Closed as program error.

Error description

• Alloctes the data set even it does not exist.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IMS DRF Version 3 release one   *
  *                 might be affected.                           *
  *                                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: The DRF VERIFY Function with ALLOC does *
  *                      not work correctly with datasets on SMS *
  *                      managed volumes.                        *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  With SMS managed volumes,  the datasets can be dynamically
  allocated even if they do not actually exist.  This
  results in DRF VERIFY thinking the dataset exists when it
  really doesn't.
  

Problem conclusion

• AIDS: RIDS/UTIL RIDS/DBS DBS/UTIL
    GEN:
  
  *** END IMS KEYWORDS ***
  A new module FRXYVDS0 is created and called prior to doing the
  allocation. The new module will verify that the data set exists
  on the volser and so prevent the problem of data set not exists.
  
  The following modules are modified:
  FRXYALL0, FRXIDYN0 are modified to call verification module.
  FRXMINI0,FRXMINI1, FRXMNP,FRXRVGB are modified to load the new m
  FRXBDMG0,FRXMTC are modified for adding a new message.
  
  A new message is added to IBM IMS Database Recovery Facility for
  User's Guide and Reference (SC18-9407-02), in chapter 7, message
  Codes of IMS Database Recovery:
  
  FRD4212I  DATA SET DOES NOT EXIST, RC=xxxxxxxx DSN=DS name.
  
  Explanation: Before a data set is allocated, a verification call
  processed. The message is issued if the data set does not exist.
  
  xxxxxxxx: The return code returned by verification call.
  DS name: Data set to be allocated.
  
  System action: Open will fail for this data set. Recover continu
  for the rest of the data sets.
  
  Modules: FRXYALL0, FRXIDYN0
  

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:

  UK35660

Modules/Macros

• FRXBDMG0 FRXIDYN0 FRXMINI0 FRXMINI1 FRXMNP
  FRXMTC   FRXRVGB  FRXYALL0 FRXYVDS0 H27L310J
  

Fix information

• Fixed component name

  IMS DB RECOVERY

• Fixed component ID

  5655I4400

Applicable component levels

• R310 PSY UK35660

     UP08/04/18 P F804