Hi, I was developing a fairly elaborate spreadsheet (involved logic statements in computations), and suddenly found that I was getting wrong answers as I tested. It turned out that the calculations were not updating as I made changes to the inputs. I found that I could make the calculations work if I clicked on "Calculate Now in the "Calculate" menu" each time I changed an input. I have verified that "Auto-Calculate" is checked in the "Calculate" menu and I turned it off and then back on with no effect. I thought that maybe the logic statements were too long but I found that inputs to simple statements did not calculate either. What I can't understand, is that the SS was updating fine earlier and then suddenly began not recalculating when I change an input. I have reinstalled AW6 and still get the same results. Anyone have an idea about the cause of this? Thanks, Bob