Not sure, I guess I can do that. In the example I just removed the ref's to the DLL's and added them back pointing to the new version and then it worked just fine.

 Were you able to try the demo I sent? Did that work fine or were you able to get the error?

Forgot about the database part....My bad.

 I think I just figured out the problem. If you look at the demo you might see that I added a tab to the tools and added my ES objects to it. I then would drag what I needed onto the form. This ES object would then be the datasource for the bindingsource object and filled when the form loads. Using the objects in this maner caused the error.

So now I went in and added a new datasource to the project(Data-->Add New Data Source), select object, select ES object, now you have a new datasource. Now set bindingsource object to this datasource and use the following:

        Dim acctcoll As New DAL.NSS.DataObjects.AccountsCollection
        acctcoll.LoadAll()

        Me._AccountsCollectionBindingSource.DataSource = acctcoll
        Me.C1TrueDBGrid1.DataView = C1.Win.C1TrueDBGrid.DataViewEnum.Hierarchical

Now it loads with no errors. Of course the Hierarchical mode doesn't seam to work, but I'll bring that up later after I play with it some more.

I'm guessing I was using the ES objects wrong for Design time binding and this is the correct way? Hope that was clear.