Using the coprocessor is NOT exactly the same as running the preprocessor
and then the compiler.  As far as I know, there have been NO reports of
"different run-time" results from the two, but there are things that using
the coprocessor can do that the preprocessor can't (see the Programming
Guide for details) e.g. 
  http://publibfp.boulder.ibm.com/cgi-bin/bookmgr/BOOKS/IGY3PG40/3.1.2.2 

I would, however, check you LISTINGS to make certain that all the "Options
in Effect" are the same with the two methods.  It is possible that one of
your compiler procs has different settings and this COULD impact run-time
results.

<[EMAIL PROTECTED]> wrote in message
news:<[EMAIL PROTECTED]>...
> In our shop, for CICS COBOL programs, we run the preprocessor
> DFHECP1$, then
> the compile step IGYCRCTL.
> I thought of bypassing the DFHECP1$ step by running the IGYCRCTL with
> 'CICS' in
> the parm.
> 
> That was fine.
> 
> Except, a co-worker pointed out to me that the generated object code
> differs,
> and, as such, is apprehensive.
> 
> Does anyone know why that is?
> 
> 
> Thanks

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