Error saving as xlsm: Wkbk contains script objects

[TomPC]

Hi All

I'm mid-conversion from Office 2002 to Office 2007 on XP.

I have opened a 2002 book with macros and am trying to save it as a macro-enabled wb (.xlsm).

Has anyone encountered this error message before?

This workbook contains one or more of the following features that are not supported by the selected file format:

• Script objects

To save the workbook without these features, click OK.
To keep using these features, click Cancel, and then select a file format that supports these features.

Can anyone tell me what any script object is likely to be in this context?
The book appears to be relatively elementary in all other respects and I'm tempted to just save it and lose the 'features'. However, **** it! I'm just too curious

Thanks for any advice,

Tom