Hi Martyn,

http://xldynamic.com/source/xld.xlFAQ0024.html

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Kind regards,

Niek Otten
Microsoft MVP - Excel

"OU_MartynF" wrote in message ...
|I have a very basic spreadsheet that has a simple formula that divides two
| cell values to produce a percentage. The two values are the result of a sum
| adding 20 other values.
|
| I have recently found that if any of the 20 values are changed, the
| resulting percentage formula does not update.
|
| I have the spreadsheet set to AutoCalc and I ahve tried F9. Looking through
| earlier posts on here I have discovered the Ctrl-Alt-F9 trick that forces a
| full calculation. This seems to work okay and does update the formula. The
| problem I have is that our Finance department are now questioning the
| reliability of Excel. I don't want to have them pressing Ctrl-Alt-F9 every
| 20 minutes or so just to make sure the spreadsheet is updating.
|
| Is this a known bug within Excel ? What is it that actually causes it to
| happen ?
| Is there a way to stop it happening ?
|
| Any advice would be much appreciated.
|
| Thanks
|
| Martyn