[tex4ht] split environment and exerquiz package

Tomas Davidek Tomas.Davidek at cern.ch
Thu Jan 7 22:34:16 CET 2021


    I made several tests with tex4ht. The tool nicely converts most of 
the objects/environments, but I noticed two problems:

1. split environment

I use that for typesetting long formulas, for instance

This is my very long formula

       \tau(\eta^0) & = \frac{\hbar}{\Gamma(\eta^0)} =
       \frac{\hbar c}{c \Gamma(\eta^0)} =
         10^{8}~\mathrm{m}\cdot\mathrm{s}^{-1}\times 1{,}30~\mathrm{keV}}
         = \\
       & = \frac{0{,}197\cdot 10^{-15}~\gev\cdot\mathrm{m}}{3\cdot
         10^{8}~\mathrm{m}\cdot\mathrm{s}^{-1}\times 1{,}30\cdot
         10^{-6}~\mathrm{GeV} = % \nonumber\\
       0{,}0505\cdot 10^{-17}~\mathrm{s} = 5{,}05\cdot
       10^{-19}~\mathrm{s} % \nonumber

This works perfectly in pdflatex, but when running htlatex, I get the 
following error message:


! Package amsmath Error: \begin{split} won't work here.

See the amsmath package documentation for explanation.
Type  H <return>  for immediate help.

l.79       \end{split}

! Emergency stop.

l.79       \end{split}


Can someone please help me in figuring out what's wrong and how to avoid 

2. I am using exerquiz package of AcroTeX education bundle 
(https://ctan.org/pkg/acrotex) which easily allows to typeset individual 
exercises and display/hide solutions. Unfortunately, it does not seem to 
work with tex4ht, when running htlatex, there is a conflict with one of 
the include file (epdfmark.def, part of this CTAN package)


) (/usr/share/texlive/texmf-dist/tex/latex/hyperref/htex4ht.def) 
) (./eforms.sty (./epdfmark.def))

exerquiz: * Using dvipsone/dvips option *

! LaTeX Error: Command \theHquizno undefined.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.

l.297 \renewcommand\theHquizno
{\curr at quiz.\theeqquestionnoi.\alph{quizno}}
! Emergency stop.

l.297 \renewcommand\theHquizno
{\curr at quiz.\theeqquestionnoi.\alph{quizno}}

I understand that processing some environments that are not part of 
standard TeXLive distribution might be problematic. Nevertheless, is 
there a way to tell htlatex to e.g. to deal with them as images? Or any 
other way?

Thanks a lot for any hint

best regards,


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