I've attached a simplified version of my database so you can see the problem I run into. I created a query to give me the sum of a number called 'qry_TheoreticalYield'. When you open the query itself, it works as expected, giving the total. However, when I added this query to a report it always asks for a parameter 'tbl_Formulas.Item'. Can someone tell me why? I've looked everywhere and can't figure out why it keeps asking for this. Any help would be appreciated.