Hi Vicente,

Thanks for catching another bug.

Vicente Vera <vicentemvp@gmail.com> writes:

> Just tried to export an Org file to ODT but this error appeared (taken
> from the Messages buffer):
>
> ...
> LaTeX to MathML converter not available.
> Formatting LaTeX using verbatim
> OpenDocument export failed: Assertion failed: (funcall predicate element info)
>
> Tried with a MWE and with a minimal init.el (because of
> org-export-backends and the "odt" symbol) but the error persists.

Yeah, my guess is that the error is in org-odt-format-label.  It used to
be that an inline formula would not have a label.  But now it does.  So
label is non-nil.  The attached patch seems to fix it, but
org-odt-format-label is pretty fragile in its assumptions...

I also pushed a fix to org.el that may be related if you e.g. use
latexmlmath.

For the record, it can be reproduced with the following example from 
emacs -q.

—Rasmus

* set up							   :noexport:
#+BEGIN_SRC emacs-lisp
  (require 'ox-odt)
  (setq org-latex-to-mathml-convert-command
          "latexmlmath \"%i\" --presentationmathml=%o")
#+END_SRC
* test
  see \(x\)

-- 
Don't panic!!!