SUBJECT:         APAR  NUMBER: PQ37720
 
REFERENCE:  AREA:     TPFDF CRUISE UTILITY
            SEGMENT:  UFI313     - RELEASE:  TPFDF (Assembler)
            SEGMENT:  UFI413     - RELEASE:  TPFDF (Assembler)
            SEGMENT:  UFI613     - RELEASE:  TPFDF (Assembler)
            SEGMENT:  UFI713     - RELEASE:  TPFDF (Assembler)
 
 
Pre-requisite APARs are (TPF only) :
FOR SEGMENT UFI313     (Assembler) - REL TPFDF
      PQ23489 PQ23871
FOR SEGMENT UFI413     (Assembler) - REL TPFDF
      PQ23489 PQ23871
FOR SEGMENT UFI613     (Assembler) - REL TPFDF
      PQ23489 PQ23871
FOR SEGMENT UFI713     (Assembler) - REL TPFDF
      PQ23489 PQ23871
To be applied in the order listed for each segment.
ABSTRACT OF PROBLEM
___________________
On ALCS, during CRUISE chain chase processing FCRU0204E messages
may be issued by TPFDF incorrectly.
 
COMMENTS ON PROBLEM
___________________
 
During  CRUISE  chain  chase  processing on ALCS, a pointer to a
core block is passed to a created ECB.   When  the  created  ECB
attempts  to  access  the core block, the block has already been
released by the parent ECB. On ALCS, released blocks are reallo-
cated by the system quickly.   Therefore the data  read  by  the
created  ECB  may  no longer be valid.  This will cause TPFDF to
issue a find error. For example,
 
  FCRU0204E 08.47.08 FIND ERROR - B075 - 00084D5C SEARCH ADDRESS
                                - B075 - F40640F4 FROM REFERENCE
 
SOLUTION
________
CRUISE chain chase processing has been updated to pass the  dis-
placement  to  the  core  address to the created ECB.  Then, the
created ECB will load the correct core address using the  passed
displacement.  Now, CRUISE chain chase processing will no longer
issue the FCRU0204E message unless a valid find error occurs.
 
DEPENDENCIES
____________
 
Related Segments Affected By This APAR.
_______________________________________
 
Segments to be assembled or compiled:
 
Segments to be link edited:
 
Migration Considerations
========================
None.
 
-- END APAR PQ37720
 
 
 


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