Thanks for your answers. That worked perfectly.
Martin

> From: n.goaziou@gmail.com
> To: mart_00@hotmail.com
> CC: emacs-orgmode@gnu.org
> Subject: Re: org Publish subtree to pdf
> Date: Sat, 17 Aug 2013 10:28:06 +0200
> 
> Hello,
> 
> Martin Leduc <mart_00@hotmail.com> writes:
> 
> >   I have a large org file with several projects in it. I can export one of
> > them (a subtree) to pdf by using C-c C-e C-s l o. However, I would like to
> > use the Publish function since it allows to export the pdf to another folder. 
> >
> > However, by using C-s (Subtree option) and P (for publish) and x (to choose
> > template from org-publish-project-alist), the Subtree option does not seem
> > to work well.
> 
> Subtree export is not meant to be used along with publishing. The latter
> works on complete files only.
> 
> > The entire tree is exported though without the content of higher-level
> > headlines.
> >
> > Is it the normal behavior to be expected from the publish function ? What is
> > the best way to export in pdf to another location ?
> 
> Use EXPORT_FILE_NAME node property. See penultimate paragraph from
> section 12.3 in the manual.
> 
> 
> Regards,
> 
> -- 
> Nicolas Goaziou