HI Kyle,

This solved my problems

 Thanks, 

M

On Mar 9, 2021, at 11:49 PM, Kyle Meyer <kyle@kyleam.com> wrote:

Marvin M. Doyley writes:

Hi there,

When I use crossref-add-bibtex-entry it download the BibTeX entry but cannot download the associated pdf.
I get the following error  (wrong-type-argument stringp ("/Users/doyley/Dropbox/Filing_Cabinet/B/refs/pdf/“))

I configured org-ref as follows

(setq org-ref-bibliography-notes '("/Users/doyley/Dropbox/Filing_Cabinet/B/refs/ref_notes.org") 
     org-ref-default-bibliography '("/Users/doyley/Dropbox/Filing_Cabinet/B/refs/ref.bib") 
     org-ref-pdf-directory '("/Users/doyley/Dropbox/Filing_Cabinet/B/refs/pdf/")
  org-ref-notes-citation-link '("cite")
     )

[ Caveat: I've never used org-ref ]

org-ref's 0383cc2 (support multiple pdf directories, 2016-06-10) updated
org-ref-pdf-directory to accept a list value, so your value is valid,
but...

Debugger entered--Lisp error: (wrong-type-argument stringp ("/Users/doyley/Dropbox/Filing_Cabinet/B/refs/pdf/"))
 file-name-as-directory(("/Users/doyley/Dropbox/Filing_Cabinet/B/refs/pdf/"))
 doi-utils-get-bibtex-entry-pdf(nil)

... doi-utils-get-bibtex-entry-pdf wasn't updated for that (+cc the
author of that commit and John Kitchin).

It looks like org-ref-pdf-directory still supports a string, though, and
you only have one item, so you should be able to work around the issue
with

 (setq org-ref-pdf-directory "/Users/doyley/Dropbox/Filing_Cabinet/B/refs/pdf/")