One manual action that you may do to force the recalculation of formulas is
open the replace tool (menu Edit-Replace), and then replace "=" with "="
(just the equal sign, not the quotation marks).
It looks something trivial, as you replace one thing for the same, but it
may trigger the recalculation you need.

Miguel.

"DK" wrote:

Greetings and thank you in advance for any help.

I have a workbook that is 671K in size and contains about 75 different
worksheets. The first tab is a summary and details are provided on the
remaining tabs.

The problem I'm having is that the summary sheet has stopped updating. The
formulas are simple (e.g. sum a row, show the contents of a cell, etc.).
Calculation is set to automatic but I've tried switching it to manual and and
still nothing.

The only way a cell will update is if I select a specific cell, F2 then ENTER.

Any help you might provide is appreciated.