Hi Richard, Can you help me with a problem using a Combo Box? Here goes. This is an inventory application with an Item table containing a SizeID and a Size look up table containing the SizeID and SizeDesc. I'm using the Combo Box to select Items with the SizeDesc to add to a third table, PickPack. The Item to PickPack table update works just fine but the Size table is also being updated with another entry for SizeDesc. That is, 'large' is now listed in the Size table twice. How can I prevent the Size table, a reference table, from being updated in this instance? Many thanks. Arul