Re: RE:OVRDBF not working between multiple programs.

["John Taylor" <jtaylor@xxxxxxxxxxxx>]

Lisa,

> Can someone explain why you would do the OVRDBF with QCMDEXC in the RPG,
> rather than in the CLLE that he already has?  I always do it in the CLLE
> (with NAG QILE) ... what's the advantage of doing in the RPG (other than
> being more visible, I guess ... that has bit me a couple times!)

This issue arises because of the scoping rules applied to file overrides.
Scoping is controlled by the OVRSCOPE parameter of the OVRDBF command, and
offers three possible values:

*ACTGRPDFN
*CALLLVL
*JOB

 *ACTGRPDFN is the default, and the one that's bitten you in the past.
That's because it tells the system to set the scope of your override
differently, based upon whether or not you're running in the default
activation group. When running in a named AG, your override is scoped to all
programs running within the same activation group. However, when running
within the DAG, it's actually scoped to the call level from where it was
issued. So, in the example given previously, the override was out of scope
as soon as control was returned from the CLLE procedure that issued it,
because the call level was the call stack entry of the CL procedure itself.

The use of QCMDEXE is recommended because it allows you to get around that
little problem. When an override is issued through this API, the call level
is the call stack entry of the procedure which invoked QCMDEXE - not the API
itself. Thus, it results in the behaviour that you originally expected.


Regards,

John Taylor