Hello, I have a database that tracks purchase orders.  I have a subform containing the inventory. I have a inventory table that contains a specific part number and description. On the subform I use a lookup field for the part # and separate box that uses dlookup for the description.  Everything works fine on the form. The dlookup field is not updating the main table.  All the other data is updating correctly. I'm at a loss.  Thanks in advance. Chris