I'm having a problem where whenever I change a particular cell in a relatively complex spreadsheet I built, Excel crashes. The cell is a trigger cell that changes a list of assumptions to calculate a particular scenario. The spreadsheet was working fine and then, all of sudden, this problem arose. I had this same problem about 3 weeks ago and ended up copying individual tabs into a new spreadsheet and globally replacing the links so it was working. That worked okay until this most recent incident. The stranger thing is it seems I can open the spreadsheet using Excel for Windows and it doesn't crash. If anyone has any thoughts, I'd appreciate it.