> -----Original Message-----
> From: IBM Mainframe Discussion List On Behalf Of ??? ?? ???
>
> Hi,
>
> We currently run CICS TS v1.3 in production and have started
> to install CICS TS v3.1.
>
> CICS uses an SVC and is also defined as a subsystem.
>
> Telling CICS which SVC to use is simple.
>
> How can I have two versions of the subsystem code DFHSSIN running?
> Do I need to have two versions, or can I use one version of
> DFHSSIN (the new one or the old one),
In all CICS upgrades through CTS 2.3, you can simply use the higher-level
DFHSSIN (and DFHCSVC, and if applicable DFHHPSVC) for "everything". Haven't
done CTS 3.1 yet, but know of no reason why IBM would change their downward
compatibility philosophy.
-jc-
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