In a recent note, J R said:

> Date:         Mon, 24 Apr 2006 16:24:54 -0400
> 
> Your inclinations assume that:
> (a) DCBDSORG will change during OPEN, and
> 
> I don't believe (a) ever happens.
> 
I certainly did assume that.  Have I misunderstood the
following:

    Title: z/OS V1R5.0 DFSMS: Using Data Sets
    Document Number: SC26-7410-03

#       3.2.2.1 "z/OS V1R5.0 DFSMS: Using Data Sets"

  3.2.2.1 Filling in the DCB

    4. From the JFCB, OPEN fills in any field not completed in the DCB or
       DCBE. This completes what is called the forward merge.

??? (I know, it's pretty complicated.)

> >From: Paul Gilmartin <[log in to unmask]>
> >Date: Mon, 24 Apr 2006 13:35:55 -0600
> >
> >My inclination would be to verify:
> >
> >o DSORG != PO in the DCB after OPEN.

-- gil
-- 
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