Excel formulas in every worksheet stopped working on 1/1/19. These are financial spread sheets that are set up to calculate debits and credits, as in a checkbook. A Check writing spreadsheet that is set up to write out an amount in words once the numeric field is complete has also stopped working. I did notice that if I save the document the fields automatically correct themselves, but I don't always remember to do a save to correct the spreadsheet. The errors have caused big headaches for the last two weeks. Any help would be appreciated.
Update: problem resolved. Formula option set on manual, has now been reset to automatic.