pdf viewer opening instead of reference

Hi

I have a recurring problem with endnote 6.0.2 on Mac 10.8.3, and haven’t located any other comments about it online.

If I highlight and save a pdf document from a reference in the endnote pdf viewer, after I’ve closed it I then can’t open the reference. Double clicking on the ref in the list just brings the pdf viewer up.

Any idea what’s happening or how I can fix it?

Cheers

Scratch that - it now happens even if I don’t do anything with the pdf other than open and close it.