Hi Nick, I tried what you suggested, but the problem still persists. Here the backtrace
Debugger entered--Lisp error: (error "Invalid image file name `nil'") signal(error ("Invalid image file name `nil'")) error("Invalid image file name `%s'" nil) image-type(nil png nil) create-image(nil png nil :pointer arrow) apply(create-image nil png nil (:pointer arrow)) (let ((image (apply (quote create-image) file (quote png) nil args))) (setq doc-view-current-image image) (insert-image image (concat "[" file "]") nil doc-view-current-slice)) doc-view-insert-image(nil :pointer arrow) (let ((beg (point))) (doc-view-insert-image (nth (1- page) doc-view-current-files) :pointer (quote arrow)) (put-text-property beg (point) (quote help-echo) doc-view-current-info)) (let ((len (length doc-view-current-files))) (if (< page 1) (setq page 1) (if (> page len) (progn (setq page len)))) (setq doc-view-current-page page doc-view-current-info (concat (propertize (format "Page %d of %d." doc-view-current-page len) (quote face) (quote bold)) (if doc-view-current-converter-process " (still converting...)\n" "\n") (if (and doc-view-current-search-matches (assq doc-view-current-page doc-view-current-search-matches)) (progn (concat (propertize "Search matches:\n" (quote face) (quote bold)) (let (...) (progn ...) contexts)))))) (setq inhibit-read-only t) (erase-buffer) (let ((beg (point))) (doc-view-insert-image (nth (1- page) doc-view-current-files) :pointer (quote arrow)) (put-text-property beg (point) (quote help-echo) doc-view-current-info)) (insert "\n" doc-view-current-info) (goto-char (point-min)) (forward-char) (setq inhibit-read-only nil)) doc-view-goto-page(1) org-docview-open(#("540.full.pdf::1" 0 15 (org-attr nil))) org-open-at-point() org-open-at-mouse((mouse-2 (#<window 3 on *Backtrace*> 33 (58 . 15) 250980086 nil 33 (5 . 0) nil (3 . 15) (11 . 23)))) call-interactively(org-open-at-mouse nil nil) cheers M