On Mon, 4 Aug 2014 06:06:59 -0700, Hardee, Chuck wrote:
>
>I'm sort of think that the OP is writing something for use under TSO/ISPF 
>because of his query about STEPLIB, TASKLIB and ISPLLIB, which then implies 
>that he may need to preserve a concatenation group, like STEPLIB, before he 
>adds to it so that when his program terminates he can put it back like it was.
> 
Can one do *anything* to STEPLIB?  I thought it was peculiarly
sacred; immutable.  But I've never tried a concatenate-deconcatenate
operation.  I'm trying to imagine what happens if one LOADs a module
from the newly concatenated library with deferred fetch of the pages,
then deconcatenates before all pages are fetched.

>-----Original Message-----
>From:  Charles Mills
>Sent: Monday, August 04, 2014 8:59 AM
>
>I believe you can concatenate any two allocations that make sense to
>concatenate. All you need is the two DD names.
> 
I would say "... two or more ..." as I've used BPXWDYN( 'concat ...' ).
and I find the minimum of two an irritant; inadequate handling of
boundary conditions.  I have an allocate-and-concatenate wrapper
to BPXWDYN in which I must test for and handle specially the case
of a single element list.

-- gil

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