On Fri, 11 Oct 2013 12:17:53 -0500, Paul Gilmartin <[email protected]> wrote:

>>". >Might one assume, then, that with SYMBOLS=CNVTSYS substitution
>is performed on the Reader/Converter system, before job initiation,
>and JCL errors could be reported.  If SYMBOLS=EXECSYS, it's not
>clear whether conversion is performed before or during job step
>execution.

What part of "in-stream symbolic substitution is performed by JES2 when an 
in-stream data set is read" isn't clear that this is done at execution time 
when the program reads the SYSIN input ?

Doug

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