Dear list, I just got to know org-ref, and I followed the github help page to manually install the package and set the default path similar to the configuration provided in the follow link: https://github.com/jkitchin/org-ref And I installed all the dependency packages like helm-bibtex, hydra etc. But when I am citing (using "C-c ]") an existing entry which is in the default references.bib file, I can see the entry after I stroke the command, but after I selected it and pressed enter, when the cursor is on the link, the mini-buffer says: !!! No entry found !!! But previously the org-ref-helm-insert-cite-link properly showed that entry. This can only work when I manually add a bibliography link at the bottom of the file, which means org-ref is not using the default bibliography file. So what should I check to fix this issue? Thanks for your help! The following is my configuration of org-ref: #+BEGIN_SRC emacs-lisp (setq org-ref-path (concat my-dropbox-path "software/org-ref/")) (setq reftex-default-bibliography (concat my-dropbox-path "bibliography/references.bib")) ;; see org-ref for use of these variables (setq org-ref-bibliography-notes (concat my-dropbox-path "bibliography/ notes.org") org-ref-default-bibliography (concat my-dropbox-path "bibliography/references.bib") org-ref-pdf-directory (concat my-dropbox-path "bibliography/bibtex-pdfs/")) ;; *** helm-bibtex (setq helm-bibtex-bibliography (concat my-dropbox-path "bibliography/references.bib")) (setq helm-bibtex-library-path (concat my-dropbox-path "bibliography/bibtex-pdfs")) ;; open pdf with system pdf viewer (works on mac) (when (eq system-type 'darwin) (setq helm-bibtex-pdf-open-function (lambda (fpath) (start-process "open" "*open*" "open" fpath)))) ;; alternative ;; (setq helm-bibtex-pdf-open-function 'org-open-file) (setq helm-bibtex-notes-path (concat my-dropbox-path "bibliography/helm-bibtex-notes")) (global-set-key [f10] 'org-ref-open-bibtex-notes) (global-set-key [f11] 'org-ref-open-bibtex-pdf) (global-set-key [f12] 'org-ref-open-in-browser) (add-to-list 'load-path org-ref-path) ;; make sure you have dash, helm, helm-bibtex, ebib, s, f, hydra and key-chord ;; in your load-path ;; auto-install dependencies (require 'org-ref) ;; optional but very useful libraries in org-ref (require 'doi-utils) (require 'jmax-bibtex) (require 'pubmed) (require 'arxiv) (require 'sci-id) #+END_SRC -- Regards Multi-Agent System Lab University of Science and Technology of China K.Chen