[tex4ht] is this a bug in tex4ht? Bad mathchar (79119) using \sum with mathml

[Michal Hoftich]

I don't know what exactly is the issue, but mathml option causes
redefinition of lot of math commands and I think you shouldn't use
this option when you want to convert math to images.

Michal

2014/1/9 Nasser M. Abbasi <nma at 12000.org>:
>
> There seems a problem using \sum with tex4ht. I was able to
> reproduce it all the time with specific configuration. This
> happened when I was trying different configurations to check
> some things.
>
> Here is MWE:
>
> ----------------------------
> \documentclass{article}
> \begin{document}
>     $\sum F_{x}=m\ddot{x}$
> \end{document}
> -----------------------
>
> Here is the command to produce the error
>
>     make4ht foo.tex "nma"
>
> here is the error
>
> --------------------------------------
> (/usr/local/texlive/2013/texmf-dist/tex/generic/tex4ht/html-mml.4ht)
> (/usr/local/texlive/2013/texmf-dist/tex/generic/tex4ht/html4-uni.4ht))
> (./foo.aux))
> ! Bad mathchar (79119).
> <to be read again>
>                    _
> l.6 $\sum F_
>             {x}=m\ddot{x}$
> ?
> --------------------------------
>
> Here is nma.cfg which is in the same folder as foo.tex
>
> ---------------------------------
> \Preamble{xhtml,mathml,ext=htm,charset="utf-8",p-width,pic-align}
> \begin{document}
> \Configure{$}{\PicMath}{\EndPicMath}{}
> \Configure{PicMath}{}{}{}{ class="math" align="absmiddle"}
> \EndPreamble
> -----------------------------------
>
> If mathml is removed from the above, then no error.
>
> If mathml is now back to the .cfg, but removing the first \Configure
> line inside the \begin{document} then the error goes away as well.
>
> Only when mathml and the \Configure{$}{\PicMath}{\EndPicMath}{} is
> there, will this error show up.
>
> Using texlive 2013, on linux.
>
> Can someone please verify this and if you think this is a bug and if
> I should enter a bug report then.
>
> thanks,
> --Nasser
>
>
>