This answer is based on the last time I looked (it may be different for 
current versions of JES2 that I don't have)

The number of internal readers is set in JES2 by the RDINUM parameter on 
the INTRDR statement. That's the limit.  I don't see documentation 
allowing RDINUM to be set by the $SET INTRDR command.    As with any other 
SYSOUT file, the resources are in use from ALLOCATE until FREE, although I 
think you can use FREE=CLOSE to make sure it's freed when closed.


Tim Hare
Senior Systems Programmer
Florida Department of Transportation
(850) 414-4209

> I remember seeing cautions on this list that SYSOUT=(,INTRDR)
> be used with restraint because of resource constraints.  So:
> 
> o What resource(s)?
> 
> o How many INTRDRs can (typically) be active concurrently?
> 
> o Can an installation modify the limit?  What are the costs
>   of doing so?
> 
> o Are the resource(s) occupied from ALLOCATE until FREE, or
>   merely from OPEN until CLOSE?
> 

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