In a recent note, Charles Mills said:

> Date:         Tue, 27 Sep 2005 17:54:59 -0700
> 
> Not sure where SMS plays in here.
> 
I tried it.  If the data set is SMS controlled, it gets uncatalogued.  And
there's a significant difference in the allocation messages from the PASSing
step.  For the non-SMS case:

    IEF236I ALLOC. FOR UNCAT STEP2
    IEF237I 3CC0 ALLOCATED TO DD2
    IEF142I UNCAT STEP2 - STEP WAS EXECUTED - COND CODE 0000
    IEF285I   user.PASSED.DATASET                          PASSED
    IEF285I   VOL SER NOS= volser.

... and the SMS case:

    IEF236I ALLOC. FOR UNCAT STEP2
    IGD103I SMS ALLOCATED TO DDNAME DD2
    IEF142I UNCAT STEP2 - STEP WAS EXECUTED - COND CODE 0000
    IGD106I sms.prfx.PASSED.DATASET                      PASSED,    DDNAME=DD2 

Note the IEF237I vs. IGD103I, and IEF285I vs. IGD106I.

> I'd like to understand this all a little better but its not critical to my
> world. I think you've hit the nail on the head.
> 
Ain't MVS wonderful!  I doubt any other OS provides such a variety of
surprising and interesting behaviors.  It's no wonder some consider
operationg systems lacking such features "radically immature".

-- gil
-- 
StorageTek
INFORMATION made POWERFUL

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