Have you checked that Tools/ Options/ Calculation is set to Automatic?
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David Biddulph

"JilaJ" wrote in message
...
Hello,

I have a workbook with multiple functions - vlookups, sums, etc. The
workbook was working fine, now, the cells are not updating when the data
changes.

For example, a sum of three cells does not update when one of the values
in
those three cells changes.

Any ideas?

Thanks,

Jila