Ed,

ED> I have a m/d relationship between TIBODatsets that is on separate
ED> forms established by setting the details.DataSource := master
ED> datasource value. It worked fine in 4.2x version but in 4.3 the
ED> parameter for the detail dataset (CLIENT_ID) is not correct.

it looks like the param stuff in TIBODataSet needs some further
refinishing. I suggest you to duplicate the problem in a simple app
and send it to Jason for him to look at and fix the problem.

I am suggesting that because I am sure that in the general case this
kind of master-detail setup already works; I had a sample app that now works
in 4.3A. Chances are you are doing something special that is causing
or showing the error.

Ciao
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