I have a formula that I have used for years on a sheet and it was working an hour ago and then all of a sudden it just stopped working, I went out the sheet and back in and . The formula is
=IF([Shop Order]@row = 0, (COUNTIF((RN:RN), RN@row )))
but instead of returning the value it says #INVALID COLUMN VALUE
Got it working it was something in another colum that threw off the shop order Column!