Ref:  Your note of Wed, 17 Nov 2021 09:17:36 -0700

gil writes:
> Does that affect generated code, or even ASMADATA?  Might
> any users depend on the misbehavior?

The Active Usings headings and the Using Map are just additional
information in the listing (and ADATA) so any errors in the code
to produce them does not affect the generated code.  The
incorrect calculations for dependent USINGs with non-zero based
section offset had apparently been around at least since the
SLAC modifications were integrated into HLASM release 1 in 1991.

Jonathan Scott, HLASM
IBM Hursley, UK

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