I have a parent form with four tabbed subforms. On subform x, selecting a value from a combo box should update a few controls on this subform, as well as a control on subform y, all done using dlookups. Each of the controls does have a valid control source in the same table. Right now, I can update the controls on subform x with no problem. When I add the code to update subform y, however, the control in subform y updates and saves the value,...