On Fri, 11 Oct 2013 13:21:24 -0500, Doug Henry <[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 ?
>
It equally mean "read" by the reader/converter program (isn't that also
under control of JES2?) as the program is submitted.  If (I'm guessing)
CNVTSYS means that the symbol values on the converter system are
effective, I would expect those to be unavailable on the execution system
unless the execution system can somehow query the converter system.

-- gil

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