I isolated the problem. Consider the following minimal org file: ------------cut here------------ * An example of org file Here I put a C snippet #+begin_src c int main() { printf("hello world\n"); return 0; } #+end_src ------------cut here------------ When I try to export to HTML, it gives the following error ------------cut here------------ org-babel-exp process c at position 54... htmlize-faces-at-point: Symbol's value as variable is void: overlays ------------cut here------------ I attach my init.org file. I am using the latest version of org from the git: org-version: 9.1.9 (release_9.1.9-582-gfb5872) Any idea ? Giuseppe Lipari Le dim. 8 avr. 2018 à 19:00, Giuseppe Lipari a écrit : > Dear all, > > I use org-mode to publish my web site that I update every now and then. > The site contains my lectures, and indeed I am preparing my lecture for > tomorrow. Unfortunately, while publishing the site using the usual > procedure, I get the infamous error > > Symbol's value as variable is void: overlays > > For publishing, I run emacs in batch mode from a makefile as follows: > > emacs --batch -l batch_project.el --kill > > and my batch_project.el is attached. I cannot attach a minimal file that > produces the error, because I find it difficult to come up with a minimal > example. All I can say is that the error is produced after many .org files > have been correctly processed. Everything used to work until a few months > ago. Last week I switched to the latest version of emacs from the git repo, > and today I get the error. Maybe I should clean some cache? Or change the > configuration of the project? > > Can someone suggest me any direction where I should look into? > > Thanks in advance > > Giuseppe Lipari > > > > >