DFS4330I ACBLIB KEYWORD IS INVALID WHEN DIRECTORY IS ENABLED.

Explanation
 The /MODIFY PREPARE ACBLIB command is not processed
because the ACBLIB keyword is invalid in an IMS system with IMS management
of ACBs enabled.

System action
 The command is ignored.

Programmer response
 Use DDL commands to make changes in the IMS Catalog and activate them in
the directory using the IMPORT DEFN commands to bring the changes
online.