[ESS] A RefTeX question with Sweave multi-file (variable reftex-file-extensions)

[Laurent ESS]

Hi,

     I try for the first time to create a multi files Sweave document. 
All work fine to generate the pdf file. But I have an issue with the 
"C-c =" command when I want to work with the TOC for the file included 
par \SweaveInput. I use the latest Vincent Goulet emacs distribution, my 
OS is MS windows 7.

As I read on the Sweave FAQ, I put in my .emacs.el, the code below :
-----------------------------------------------------------------------------------
(defun Rnw-mode ()
   (require 'ess-noweb)
   (noweb-mode)
   (if (fboundp 'R-mode)
        (setq noweb-default-code-mode 'R-mode)))
  (add-to-list 'auto-mode-alist '("\\.Rnw\\'" . Rnw-mode))
  (add-to-list 'auto-mode-alist '("\\.Snw\\'" . Rnw-mode))

;; Make TeX and RefTeX aware of rnw and Rnw files
(setq reftex-file-extensions
       '(("rnw" "Rnw" "tex" ".tex" ".ltx") ("bib" ".bib")))
(setq TeX-file-extensions
    '("rnw" "Rnw" "tex" "sty" "cls" "ltx" "texi" "texinfo"))
------------------------------------------------------------------------------------------------------------

When I use C-c = the files are not found (I set the variable 
reftex-toc-include-file-boundaries to see the name of every file in the 
TOC) :

output (see below for the structure of my files ) :
-------------------------------------------------------------------------------------------------------------
  File main.rnw starts here
      1 Introduction
  File file2 was not found
      2 Conclusion
  File main.rnw ends here


--------------------------------------------------------------------------------------------------------------
My main file : main.rnw
---------------------------
\begin{document}
   \section{introduction}

    \SweaveInput{addfile1.rnw}
     \include{addfile2.tex}

     \section{conclusion}
\end{document}
;;; Local Variables: ***
;;; TeX-master: t ***
;;; End: ***
--------------------------------

My file included with \SweaveInput : addfile1.rnw

  \section{addfile1}

<<plot1,echo=TRUE>>=
plot(1:10)
@
%%% Local Variables:
%%% TeX-master: "main.rnw"
%%% End:

------------------------------------------------

My file included with \Include : addfile2.tex

   \section{addfile2}


%%% Local Variables:
%%% TeX-master: "main.rnw"
%%% End:

When I use C-c = the files are not found.

  File main.rnw starts here
      1 Introduction
  File file2 was not found
      2 Conclusion
  File main.rnw ends here
-------------------------------------------------------------------------------------------------------------

If I comment the reftex-file-extensions line :

;; Make TeX and RefTeX aware of Snw and Rnw files
;;(setq reftex-file-extensions
;;      '(("rnw" "Rnw" "tex" ".tex" ".ltx") ("bib" ".bib")))
(setq TeX-file-extensions
    '("rnw" "Rnw" "tex" "sty" "cls" "ltx" "texi" "texinfo"))

------------------------------------------------------------------------------
When I use C-c = addfile2.tex is found but not the addfile1.rnw :
------------------------------------------------------------------------------
output :
-----------
File main.rnw starts here
      1 Introduction
  File addfile2.tex starts here
       2 addfile2
  File addfile2.tex ends here
       3 conclusion
  File main.rnw ends here
-------------------------------------------------------------------------------

So, I try to set the variable  reftex-file-include-commands to 
("include" "input" "SweaveInput"), but it doesn't work.

I have been searching for a day (I don't know very well 
emacs-Auctex-Reftex).

Thank you very much for your help.

Best regards
Laurent