Hello Ulrike,
> Which fatal clash? Do you have an example?
Sorry, it is not a fatal crash, only a bunch of error messages and
invalid generated HTML file. I think I've posted this sample before,
but here it is to be sure:
%%%%%%%%%%%%%%%%%%%%
\DocumentMetadata{testphase={phase-III,math}}
\documentclass{article}
\usepackage{graphicx}
\usepackage{amsmath}
\begin{document}
\section{Does section work?}
hello inline $a = b$.
\[
a = \frac{b^2}{\sqrt{c}}
\]
\end{document}
%%%%%%%%%%%%%%%%%
You can compile it using:
$ make4ht -m draft -a debug sample.tex "mathml"
Without display math, it compiles without problems, so tagging doesn't
cause errors on itself, but only when you use commands that clash.
Best regards,
Michal
