On Monday,  9 Oct 2017 at 19:07, Joseph Vidal-Rosset wrote:
> I have to work on my configuration to solve this problem, and your emails
> put me on the right way. Many thanks !

You're welcome.  I'm glad I could help, even if only indirectly!

-- 
: Eric S Fraga via Emacs 27.0.50, Org release_9.1.1-78-gfbf47c