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If you get this message while trying to insert references into a Word document, you:
- You've probably saved your Endnote library as a "package". Solution: Open your Endnote library, save as new copy, but don't "save as package". This will create two files instead of just one 'package', but it solves the problem of adding references to Word.
- Alternatively the version of your Word Endnote tools might not match the version of your Endnote application. Follow the instructions here to fix this. If you have the toolbar showing, you'll also need to close it and reopen it from the View > Toolbars menu.