DFS4494E member-name IS A BACK-LEVEL ACBLIB MEMBER.
Explanation
The IMS Catalog Populate utility (DFS3PU00) encountered an ACB library member that was generated by an IMS system that does not support the IMS catalog.
System action
No catalog record was built for the member. The utility continues to insert other records in the catalog and ends with return code 4.
Programmer response
Ensure that your JCL to run the DFS3PU00 utility refers to ACB libraries that were generated by a version of IMS that supports the IMS catalog. If the problem persists, contact IBM® Software Support.