I have a .xlsm document that a schools needs to edit but I get this error message.

errors were detected while saving "FILENAME.xlsm" Microsoft excel may be able to save the fil by removing or reparing some features. To make the repairs in a new file clixk continue.
To canel saving click cancel.

It works at other schools and I can save text to a page and save.

Tried a new download, saving it the C drive rather than a network share and tried as administrator but non of these have helped.

Running Windows 7 32 SP1, Office 2010 on a Server 2008 domain.

Any ideas would be greatly appreciated as I have run out.

Thanks in advance.