On DB2 Version 8 with fix PK04076 (PTF UK03983), if the required DFSORT code is not installed correctly, you cannot use any of the DB2 utilities that invoke SORT. DB2 issues the message "DSNU1640I Z/OS DFSORT LOAD MODULE NOT LOADED," and the utility fails.
Resolving the problem
DFSORT™ APAR PQ68263 is a prerequisite for DB2® Version 8 utilities.
DFSORT comes with the z/OS® operating system and is licensed for use with DB2 Utilities. Follow the instructions in the following documentation to enable DFSORT in your DB2 environment:
Enabling DFSORT prevents any DSNU1640I DFSORT utility failures.
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