You need a newer version of Numbers to open this spreadsheet.

Knu,

This can happen if you have both Numbers V2 and Numbers V3 and don't keep straight which you are using.

A document that has been created or edited in V3 can't be opened by V2. These documents must only be edited with version 3 now. You may not remember, but the first time you tried to edit a given V2 document in V3, it warned you and gave you the option to work on a copy.

Jerry

Hi Knu,

Wayne Contello has written a User Tip for working with the old and new versions of iWork.

https://discussions.apple.com/docs/DOC-6991

The trick is to drag icons for both versions to your Dock. Right click or control click on each and Options > Keep in Dock. That puts you in charge of which version you launch.

Here is a screen shot of both Numbers icons on my Dock.

Numbers 2.3 (Numbers '09) on the left with a three column graph.

Numbers 3.2 on the right with a four column graph.

Both versions will run happily together. Just be sure which version is opening your document.

Instead of double clicking the document, run whichever version of Numbers/Pages/Keynote suits and use File > Open.

Regards,

Ian.

Thank you, Ian. I have wasted about 90 minutes struggling with this. and your advice solved in less than a minute. Wish i found you sooner.

Marisa