I have 2 tables (PO & Item) that have the 2 elements I am doing a comparison. If the Line Revision and the PO Revision for each PO is the different, then I want to mark it "True" for further analysis. I've tried Rev Comparision= IF(PO[PORevision]=Item[ItemRevision], "True", "False") but it's giving me error! for example, Line 7 where the revision is not the same, I would want to mark it false. Can someone help please?