I've been struggling with Reftex in org-mode. Initially things are fine,

then after exporting the document to LaTeX and continuing to work with

org-mode, using most of the reftex features (e.g. reftex-toc or trying to

insert a reference) produces a "Wrong type argument: stringp, nil" error

message.

The code in my init file to set up reftex:

    ;; Reftex

    (require 'reftex)

    (defun org-mode-reftex-setup ()

      (load-library "reftex")

      (and (buffer-file-name) (file-exists-p (buffer-file-name))

         ;enable auto-revert-mode to update reftex when bibtex file changes on disk

         (global-auto-revert-mode t)

         (reftex-parse-all)

          (define-key org-mode-map (kbd "C-c [") 'reftex-citation)

         ;add a custom reftex cite format to insert links

         ;; (reftex-set-cite-format "** [[papers:%l][%l]]: %t \n")

         )

    ) 

    (add-hook 'org-mode-hook 'org-mode-reftex-setup) 

At the moment I still enter reftex-mode on demand with "M-x reftex-mode".

Here is the backtrace for the error:

Debugger entered--Lisp error: (wrong-type-argument stringp nil)

  re-search-forward(nil 10001 t)

  tex-main-file()

  reftex-TeX-master-file()

  reftex-insert-docstruct(#<buffer paper.org> t "e" nil nil t nil nil ("SEC:lagrange_gibbs_proof" "s" "We define the molar Gibbs free energy in a molecular gas mixture as \\begin{align} \\h" "/my/path/to/the/paper.org" nil) "" nil)

  byte-code("\306 \307\216\310 \210 \311 \f\203\312r q\210\313

!)!\210\202&\312\314!\210\315 \210@\316=\2040\316 \210\317\320p\"\210\321A\322\323\324\325\326B\327\330\331\332\333\257C\334 \335U\203v\336D\337\340!\210\341 E

\336FGHIJ\206kKL\336&K)\202\211J\203\206\342 J

#K\202\211\321K\321DK\206\222\321K\336J\343MNOK\344P&\211Q@RQA@S\345Q8T\321KR\204\304\346\347\336\"\210R\350=\203\321\315 \210\202 R\351=\204\337R\352=\203\365U\203\347\352R\315 \210\353 TR#\210\202 R\354=\203
\315 \210G?G\202 R\355=\203
VJ\356 \202 R\357=\2038
\315 \210U\2030
\360U!W\202 E?E\202 R\361=\203J
\315 \210F?F\202 R\362=\203\\
\315 \210H?H\202 R\363=\203n
\315 \210I?I\202 R\364=\203\201
XY\346\347\321\"\210\202 R\365=\203\264
\366Z[\"[\367[Z8A!\206\236
\370\371![Z8@\206\251
\372L q\210\373 \210\202 R;\203\324
\374R\\J\"\206\310
R

DCCY\346\347\321\"\210\202 R\375>\203]\203\350
]\237Y\202\371
S\203\366
SCCY\202\371
\336YY\203R\376\232\203\377YBYYX q\210\346\347\321\"\210\202 \370\201^!\210*\202" [wconfig buf reftex-call-back-to-this-buffer reftex-latex-syntax-table reftex-use-multiple-selection-buffers typekey current-window-configuration ((set-window-configuration wconfig)) delete-other-windows syntax-table switch-to-buffer-other-window reftex-make-selection-buffer-name "*RefTeX Select*" reftex-erase-buffer reftex-select-label-mode add-to-list selection-buffers t "----  " mode-line-buffer-identification "  " global-mode-string "   (" ")" "  S<" reftex-refstyle ">" " -%-" buffer-size 0 nil message "Creating Selection Buffer..." reftex-insert-docstruct reftex-get-offset reftex-select-item reftex-show-label-location 2 throw exit 103 114 82 reftex-reparse-document 99 115 reftex-query-label-type 116 prefix-numeric-value 70 ...] 13)

  reftex-offer-label-menu("e")

  reftex-reference()

  call-interactively(reftex-reference nil nil)

Many thanks,

Adam

Emacs  : GNU Emacs 24.3.1 (x86_64-apple-darwin, NS apple-appkit-1038.36)

 of 2013-03-13 on bob.porkrind.org

Package: Org-mode version 8.2.10 (8.2.10-35-g19a7d6-elpa @ /Users/adamjackson/.emacs.d/elpa/org-20150323/)

current state:

==============

(setq

 org-export-backends '(latex md ascii html icalendar beamer)

 org-tab-first-hook '(org-hide-block-toggle-maybe org-src-native-tab-command-maybe

                      org-babel-hide-result-toggle-maybe org-babel-header-arg-expand)

 org-latex-classes '(("beamer" "\\documentclass[presentation]{beamer}" ("\\section{%s}" . "\\section*{%s}")

                      ("\\subsection{%s}" . "\\subsection*{%s}") ("\\subsubsection{%s}" . "\\subsubsection*{%s}"))

                     ("article" "\\documentclass[11pt]{article}" ("\\section{%s}" . "\\section*{%s}")

                      ("\\subsection{%s}" . "\\subsection*{%s}") ("\\subsubsection{%s}" . "\\subsubsection*{%s}")

                      ("\\paragraph{%s}" . "\\paragraph*{%s}") ("\\subparagraph{%s}" . "\\subparagraph*{%s}"))

                     ("report" "\\documentclass[11pt]{report}" ("\\part{%s}" . "\\part*{%s}")

                      ("\\chapter{%s}" . "\\chapter*{%s}") ("\\section{%s}" . "\\section*{%s}")

                      ("\\subsection{%s}" . "\\subsection*{%s}") ("\\subsubsection{%s}" . "\\subsubsection*{%s}"))

                     ("book" "\\documentclass[11pt]{book}" ("\\part{%s}" . "\\part*{%s}")

                      ("\\chapter{%s}" . "\\chapter*{%s}") ("\\section{%s}" . "\\section*{%s}")

                      ("\\subsection{%s}" . "\\subsection*{%s}") ("\\subsubsection{%s}" . "\\subsubsection*{%s}"))

                     )

 org-speed-command-hook '(org-speed-command-default-hook org-babel-speed-command-hook)

 org-occur-hook '(org-first-headline-recenter)

 org-metaup-hook '(org-babel-load-in-session-maybe)

 org-html-format-drawer-function '(lambda (name contents) contents)

 org-log-done 'time

 org-latex-format-inlinetask-function 'ignore

 org-confirm-shell-link-function 'yes-or-no-p

 org-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default

 org-agenda-custom-commands '(("h" "\"home\": Agenda and unscheduled non-work TODOs"

                               ((agenda "" nil) (tags-todo "-work-SCHEDULED={.+}" nil)) nil nil)

                              ("H" "\"Home\": Non-work unscheduled TODOs" tags "-work-SCHEDULED={.+}" nil)

                              ("w" "Unscheduled :work:" tags "work-SCHEDULED={.+}" nil)

                              ("n" "Agenda and all TODOs" ((agenda "" nil) (alltodo "" nil)) nil))

 org-latex-format-headline-function 'org-latex-format-headline-default-function

 org-after-todo-state-change-hook '(org-clock-out-if-current)

 org-latex-format-drawer-function '(lambda (name contents) contents)

 org-src-mode-hook '(org-src-babel-configure-edit-buffer org-src-mode-configure-edit-buffer)

 org-agenda-before-write-hook '(org-agenda-add-entry-text)

 org-babel-pre-tangle-hook '(save-buffer)

 org-agenda-dim-blocked-tasks 'invisible

 org-mode-hook '((lambda nil

                  (org-add-hook (quote change-major-mode-hook) (quote org-show-block-all) (quote append)

                   (quote local))

                  )

                 (lambda nil

                  (org-add-hook (quote change-major-mode-hook) (quote org-babel-show-result-all) (quote append)

                   (quote local))

                  )

                 #[nil "\300\301\302\303\304$\207"

                   [org-add-hook change-major-mode-hook org-show-block-all append local] 5]

                 #[nil "\300\301\302\303\304$\207"

                   [org-add-hook change-major-mode-hook org-babel-show-result-all append local] 5]

                 org-babel-result-hide-spec org-babel-hide-all-hashes org-mode-reftex-setup)

 org-ascii-format-drawer-function '(lambda (name contents width) contents)

 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point org-babel-execute-safely-maybe)

 org-directory "~/Dropbox/org"

 org-enforce-todo-dependencies t

 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers org-cycle-hide-inline-tasks

                  org-cycle-show-empty-lines org-optimize-window-after-visibility-change)

 org-babel-tangle-lang-exts '(("python" . "py") ("emacs-lisp" . "el"))

 org-confirm-elisp-link-function 'yes-or-no-p

 org-metadown-hook '(org-babel-pop-to-session-maybe)

 org-blocker-hook '(org-block-todo-from-children-or-siblings-or-parent)

 org-html-format-headline-function 'ignore

 org-babel-load-languages '((python . t))

 org-html-format-inlinetask-function 'ignore

 org-agenda-files '("~/Dropbox/org/todo.org" "~/Dropbox/org/shopping.org")

 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)

 )