Joe, Please post a small assembler program that, when you assemble it, has the anomaly you cite. I'd think you could take the Metal C assembler, and strip out most of it.
The following program, based on the tiny amount of data that you chose to share in your post, when assembled on z/OS shows references to M_WSA in the listing and browsing the ADATA you can also see references to it (types x'20', x'30', x'42', x'44' -- I'm assuming that the 3rd byte of the record is the "type"): GETMAC#C CSECT M_WSA CATTR RMODE(ANY),PART(INDEX) DS 0D @1indexPTR DC (4)X'00' M_WSA CATTR RMODE(ANY),PART(HEAD) @2INDEXPTR DC (4)X'00' END Perhaps try this one yourself and see if it shows the anomaly on your zPDT setup. I would not bet that a zPDT personal license provides access to z/OS service. But I don't know for sure. Peter