After I recently updated my LaTeX installation (which I hadn't done for more
than a year), I suddenly had the problem that subsubsections no longer show up
in the TOC of the EPUB file:
----------
\documentclass[oneside]{scrbook}
\setcounter{secnumdepth}{3}
\setcounter{tocdepth}{3}
%----------------------------------------------------------------------------------------
\begin{document}
This is a test.
\chapter{Chapter Test}
\section{Section Test}
\subsection{Subsection Test}
\subsubsection{SubSubsection Test}
\end{document}
-----------
When I compile this, I get the following messages:
tex4ebook EPUB_V01.tex
[STATUS] tex4ebook: Conversion started
[STATUS] tex4ebook: Input file: EPUB_V01.tex
[WARNING] tocid: char-def module not found
[WARNING] tocid: cannot fix section id's
This is pdfTeX, Version 3.141592653-2.6-1.40.24 (MiKTeX 22.1) (preloaded
format=latex.fmt)
restricted \write18 enabled.
entering extended mode
This is pdfTeX, Version 3.141592653-2.6-1.40.24 (MiKTeX 22.1) (preloaded
format=latex.fmt)
restricted \write18 enabled.
entering extended mode
This is pdfTeX, Version 3.141592653-2.6-1.40.24 (MiKTeX 22.1) (preloaded
format=latex.fmt)
restricted \write18 enabled.
entering extended mode
1 file(s) copied.
1 file(s) copied.
1 file(s) copied.
1 file(s) copied.
HTML Tidy for Windows released on 25 March 2009
1 file(s) copied.
[STATUS] tex4ebook: Conversion finished
The end result is that the Chapter, Section, and Subsection show up in the TOC,
but the Subsubsection does not. Since I was able to generate files with
Subsubsections in the TOC in the past before the update, the logical conclusion
seems to be that something went wrong during the update process. And the
warnings
[WARNING] tocid: char-def module not found
[WARNING] tocid: cannot fix section id's
are also new.
Now, I was able to find the "char-def" module in a repository,
https://raw.githubusercontent.com/adityam/context-math/master/char-def.lua
I am unsure how to install it so that tex4ebook will find it.
Can anyone give me some advice on how to proceed?
Best regards,
- Jürgen Hubert
