Error - fields could not be added to the report

When opening a Projector report you may see the following error message: N fields could not be added to the report: [Field Name]

Solution

 This caused by the Euro Currency Tools add-in. To turn it off go to File | Options | Add-Ins | Click Go. A popup will have a box to enable/disable the add-in. In Excel 2003 this is under the tools menu.