On Thu, Dec 24, 2015 at 1:04 AM, Andreas Kiermeier < andreas.kiermeier@gmail.com> wrote: > org-ref-open-bibtex-notes() That looks like a different error that occurs in org-ref-open-bibtex-notes(). Up to that point everything looks normal. What do you have your org-ref-bibliography-notes variable set to? The default value is nil which would cause that error. John ----------------------------------- Professor John Kitchin Doherty Hall A207F Department of Chemical Engineering Carnegie Mellon University Pittsburgh, PA 15213 412-268-7803 @johnkitchin http://kitchingroup.cheme.cmu.edu