Hi Fredarwin,
I too had the same problem once upon a time.Just forgot as to how I solved it.
But from what I remember....
Did u change the relative position of ItemsbyOrder (Repeating Group) and CustomersbyOrder((Repeating Group))
i.e did u move ItemsbyOrder above CustomersbyOrder???
i.e in the DataSource Taskpane,did u select ItemsbyOrder and move up???
I dont know y it happens,but as from what I remember,I too moved one repeating group above the other in the datasource taskpane.
And I too got the same error.
So I think what I did was, get the repeating groups to the previous position.
:)) very wierd.But try it.I think it should solve.
regards,
Abhishek