On Thu, 30 Jan 2014 20:18:05 +0000, Jousma, David wrote:

>We have an exit for DFSORT that scans TIOT to see if someone concatenated a 
>DUMMY dataset as input.  Here is what I believe to be the relevant snippet of 
>code:
>    ...
>*                                 CHECK FOR DUMMY DD STATEMENT    
>*                                 NOTE: COULD ALSO BE DD *        
>DDCHK    CLC   TIOEFSRT,=AL3(0)   Q. REAL UCB ADDRESS ?           
>         BE    DDBAD              A. NO, BAD DD                   
>    ...       
>     
How does this behave for DD PATH=...?  Is the UCB address nonzero
for zFS files?  Are you unwittingly prohibiting use of zFS in the
SORTIN concatenation?  That would be imprisoning your users in
the twentieth century.

Prohibiting "DD *" is also unduly harsh.

A similar question applies to Shmuel's suggestion of DEVTYPE.

The definitive test should be for DSNAME='NULLFILE'.

-- gil

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