On Wed, 22 Nov 2023 22:35:13 +0000, Seymour J Metz <[email protected]> wrote:

>I suspect that there was a game of telegraph, whereby crucial details got lost.
>
>It is normal to allocate page datasets in a user catalog that will eventually 
>be used as a master catalog.
> I'm suspicious of the claim that z/OS can use  a page dataset that is not in 
> its own master catalog, but I can't rule it out.

There are definitely crucial details lost. Page and swap are special datasets. 
For instance, a page dataset can be in multiple catalogs (I think using 
recatalog). Only page datasets specified in PARMLIB must be in the master 
catalog. Without details, we're only guessing how it's being used. 

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