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From: SASDDI@VM.SAS.COM (Dale Ingold)
Newsgroups: comp.lang.asm370
Subject: Does conditional COPY still look for member?
Message-ID: <9105022102.AA08369@ucbvax.Berkeley.EDU>
Date: 2 May 91 19:12:52 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: IBM 370 Assembly Programming Discussion List
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We have an assembler module which does a conditional COPY (via AIF/AGO/ANOP
logic).  When attempting to assemble the module with the SET symbols set
such that the COPY instruction is not executed, we get a message that the
member specified on the COPY instruction is not found, to wit:

   IEV060  *** ERROR ***  COPY CODE NOT FOUND  --  SASCRAB

The message in itself is correct; the member does not exist on the system
on which the assembly is running.

A further interesting fact is the position of the message within the listing;
although the COPY instruction appears near the end of the module, the error
message appears much closer to the top of the listing.

Final relevant fact: we are running Assembler (H) V2

Speculation: doesn't the assembler do lookahead? And if so, could it be
looking for (via BLDL?) or actually reading in, any member specified on a
COPY instruction whether or not the instruction is actually "executed"?
Is this surprising?  Perhaps not, since the sequence symbol being branched
to might lie within the COPYed code.

Well, sitting here typing this in, I think I've answered my own question,
but perhaps it'll spark some interesting dialog.

=========================================================================
Dale D. Ingold           SAS Institute Inc.      snoddi@mvs.sas.com
MVS Host Group           SAS Campus Drive        919/677-8000 x7603
                         Cary, NC  27513-2414