Thanks Nick. You reply helps.
I'm using the org-mode development version and emacs-24 in Ubuntu.
I am not with my computer at the moment, but I will check my installation
tonight, and I will tell you if it works after a clean install.

Many thanks for your help.

Best wishes,

Jo.


2013/9/29 Nick Dokos <ndokos@gmail.com>

> Joseph Vidal-Rosset <joseph.vidal.rosset@gmail.com> writes:
>
> > Hello,
> >
> > For the first time I've tried to export into a .tex file an draft .org.
> >
> > But C-c C-e  produces an error message in my emacs :
> >
> > symbol's function definition is void: org-export-dispatch
> >
> > I've tried to read the manual, read the discussion about this point via
> google, and I am lost.
> >
> > Can I find some help? I am a beginner...
> >
>
> org-export-dispatch is the top-level function used by the exporter in
> version 8.x of org-mode: it does not exist in earlier versions. It
> should just work if you have installed org-mode correctly, so the fact
> that it doesn't indicates that there is probably an installation
> problem. So the main questions are:
>
> o What version of emacs are you running and what version of org-mode?
>
>   M-x emacs-version
>
> and
>
>   M-x org-version
>
> will tell you that.
>
> o The source of your org-mode installation: are you using the org-mode
> that came with your emacs, or did you download a different version? If
> the latter, did you use a tarball, did you clone the git repo, did you
> download from ELPA, or perhaps something else?
>
> Answers to these questions should help to determine your next course of
> action.
> --
> Nick
>
>
>