[tex4ht] tex4ebook error with latest texlive

[Chet Murthy]

Michal,

In the spirit of "MWE", I didn't mention that when I do an actual build, I
do:

 lualatex $<
makeindex $<
lualatex $<

and then

 tex4ebook -c config.cfg $<

So even if makeindex isn't getting called internally, I do call it in my
Makefile.

I'll try out your stuff tomorrow AM and report back!

Thank you again,
--chet--


On Mon, Feb 24, 2025 at 2:46 PM Michal Hoftich <michal.h21 at gmail.com> wrote:

> Hi Chet,
>
> I am not sure why this happens, but I can confirm it happens. I am sure
> the Index package used to work last year, so this seems like a regression.
> Try to put the attached version of index.4ht to the directory with your
> document. If it works, I will fix also TeX4ht sources, so it get to TeX
> Live.
>
> Also, to actually get the index, you will need a make4ht build file that
> calls makeindex or xindex. See
> https://www.kodymirus.cz/tex4ht-doc/Howto.html#indexing
> The attached build file uses xindex. It seems to work, if I add
> \printindex to the document,
>
> Best regards,
> Michal
>
> On Mon, Feb 24, 2025 at 11:03 PM Chet Murthy <murthy.chet at gmail.com>
> wrote:
>
>> It seems I've encountered a problem using tex4ebook with the latest
>> version of Texlive. I installed it this AM, and here is the version
>> information (Googling turned this up, but if this isn't the right
>> version info, please let me know and I'll send better info (and make a note
>> of it)).
>>
>> The first file (mwe.tex) produces a "TeX capacity exceeded, sorry [input
>> stack size=10000]." error.
>>
>> If I remove a single line (to yield mwe2.tex), I get lots of syntax
>> errors, none of which are produced by lualatex.
>>
>> ====
>> Files attached:
>>
>> config.cfg: tex4ebook config, obtained from Michal
>> mwe.tex: MWE for the problem
>> mwe2.tex: MWE for the second problem
>> ====
>> Version info:
>>
>> $ htlatex --version
>> This is pdfTeX, Version 3.141592653-2.6-1.40.27 (TeX Live 2025)
>> (preloaded format=latex)
>>
>>  tex --version
>> TeX 3.141592653 (TeX Live 2025)
>> ====
>> Synopsis: It looks like a bad interaction between htlatex, urls, and
>> indexes.  I'm sorry I was unable to get this MWE any smaller, but literally
>> removing any element that was left made it go thru OK.  Also, the main
>> error happened regardless of whether I ran:
>>
>> $ tex4ebook -c config.cfg working.tex
>>
>> or
>>
>> $ tex4ebook working.tex
>>
>> But I got errors from config.cfg (also attached) with the first command.
>>
>> ====
>> Error output:
>>
>> tex4ebook -c config.cfg working.tex
>> [STATUS]  tex4ebook: Conversion started
>> [STATUS]  tex4ebook: Input file: working.tex
>> [ERROR]   htlatex: Compilation errors in the htlatex run
>> [ERROR]   htlatex: Filename     Line    Message
>> [ERROR]   htlatex: ./config.cfg         ?        LaTeX Error: Command
>> \printprogram undefined in `config.cfg'.
>> [STATUS]  htlatex:  <- Type  H <return>  for immediate help. ...
>>
>> [ERROR]   htlatex: ./config.cfg         ?        LaTeX Error: Missing
>> \begin{document} in `config.cfg'.
>> [STATUS]  htlatex:  <- Type  H <return>  for immediate help. ...
>>
>> [ERROR]   htlatex: ./config.cfg         ?        Undefined control
>> sequence.
>> [STATUS]  htlatex:  <- "> l.17          {\start:LstLn \HCode{<span
>> class="label">}}% The control sequence at the end of the top line
>> [ERROR]   htlatex: ?    ?        Argument of \idx:extI has an extra }.
>> [STATUS]  htlatex:  <- \par l.16 ...package manager,
>> \texttt{opam}\index{opam} . I've run across a `}' that doesn't seem to
>> match anything.
>> [ERROR]   htlatex: ?    ?        Paragraph ended before \idx:extI was
>> complete.
>> [STATUS]  htlatex:  <- \par l.16 ...package manager,
>> \texttt{opam}\index{opam} . I suspect you've forgotten a `}', causing me to
>> apply this
>> [ERROR]   htlatex: ?    ?        TeX capacity exceeded, sorry [input
>> stack size=10000].
>> [STATUS]  htlatex:  <- {\@par } l.16 ...package manager,
>> \texttt{opam}\index{opam} . If you really absolutely need more capacity,
>> [FATAL]   make4ht-lib: Fatal error. Command htlatex returned exit code 1
>>
>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://tug.org/pipermail/tex4ht/attachments/20250224/02bf1c58/attachment.htm>