Thanks Eric and Nicolas for finding out quickly. Indeed, changing the PROPERTY: ignoreheading to block solved the issue.
I think these kind of incompatibilities should be documented, it drove me crazy many hours since of course the pdflatex error messages are totally useless to find out. I would be pleased to help but unfortunately i am totally ignorant of these subtleties. Thanks. —Stéphane. > On 17 Aug 2017, at 23:06, Eric S Fraga <esfli...@gmail.com> wrote: > > On Thursday, 17 Aug 2017 at 19:55, Stéphane Genaud wrote: >> Hello, >> i am using org-mode 8.2.10 to export to a beamer tex source. >> When running pdflatex my org-mode source file, and once i finally isolated >> the problematic bit in a single frame, pdflatex says: > > Try removing the ignoreheading property. The new exporter (okay, not so > new any more ;-)) defaults to ignoring the headline contents unless you > say otherwise. > > -- > : Eric S Fraga via Emacs 26.0.50, Org release_9.0.9-573-g09e612