I have a sheet that has a formula that will show as invalid operation until another column has had data added. Is there a way to require a column be completed? You can see below that the user didn't fill out a start date on row 1, so a job number can't be created because the formula is dependent on that data:
=[CUSTOMER NUMBER]@row + "-" + RIGHT(YEAR([START DATE]@row), 2) + RIGHT("00" + COUNTIFS([START DATE]:[START DATE], IFERROR(YEAR(@cell ), 0) = YEAR([START DATE]@row), Row:Row, @cell <= Row@row), 3)
So I need to force users to complete that column, but "make column required" is not an option. Any suggestions?