I have been pulling my hair out because the worksheets I have been using and putting a lot of work into stopped performing simple SUM calculations, i.e. SUM(A1:A5+B1:B5). I always got a #VALUE! error no matter what I did to correct it. I tried everything I could think of but the only thing that worked was to make the formula
SUM(A1:A5)+SUM(B1:B5)
Why the worksheet, which has been working normally for 6 months just suddenly stopped working is beyond me.
Anyone have an idea why this happened?
TIA
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