Quote Originally Posted by dolot View Post
OK. So that means that the Combobox.SelectedValue wasn't the issue after all, because the type of the SelectedValue is a long value like you're expecting.

Not sure where the issue is...
BTW: I edited my post above. I noticed I can add new rows with no errors. The error will only occur if I go back to a combobox and change the selection or cancel a new row.