Hi John,
I would try to debug this outside of Mnemosyne, as this really seems like a
latex issue.
Don't use Texworks (as this is not used by Mnemosyne), but rather from the
command line, try typing the following two command in the correct directory:
latex -interaction=nonstopmode tmp.tex
dvipng -D 200 -T tight tmp.dvi
These are exactly the same commands that Mnemosyne uses as well.
If these commands generate a correct png image, then it's a mnemosyne problem.
If these commands don't work, then it's a problem with your latex/chemfig
install, and you're better off asking on their mailing list for help.
Hope this helps,
Peter
On Tuesday, October 04, 2011 10:29:46 PM John Terex wrote:
> Hello,
> I'm trying to write chemical formula using the LaTeX package chemfig.
> I have added the //usepackage{chemfig} to my config.py preamble. I
> have added the chemfig package using the MikTeX package manager. I
> have rebooted my machine. I have removed all existing .png files.
> Here's my problem. I am attempting to write a very simple chemical
> formula: H-C~N, where the ~ represents a triple bond. I write the
> following formula on the front of the card: <latex>\chemfig{H-C~N}</
> latex>, and press the preview button.
> The resulting preview superimposes the H,C, and N all on top of one
> another, with none of the chemical bonds (see image).
>
> Troubleshooting:
>
> the cmd.exe releases the following error multiple times: < raw
> PostScriptdvipng warning: PostScript environment contains DVI commands
> dvipngwarning: PostScript environment contains DVI comands
> dvipngwarning: No image output from inclusion of raw PostScript >
>
> the tmp.dvi file does not render the molecule correctly either. It
> also superimposes the atoms, but also includes some super-streched
> bonds going off in a diagonal. (see image)
>
>
> the tmp.tex file outputs normally (see image):
> \documentclass[12pt]{article}
> \usepackage{chemfig}
> \pagestyle{empty}
> \begin{document}
> \chemfig{H-C~N}
> \end{document}
>
> The tmp.tex file compiles and outputs the correct file in .pdf format.
> (see image)
>
> image:
> https://picasaweb.google.com/lh/photo/caK51waIx0sO6jkT3ebAaw?feat=directli
> nk
>
> I am a new user to both LaTeX and Mnemosyne, and I've exhausted my
> ability to solve the problem with Google searching. Any idea why
> TeXworks will generate the correct .pdf, yet Mnemosyne does not
> generate the correct .png?
>
> Thanks!
> -John.
--
Peter Bienstman
Ghent University, Dept. of Information Technology
Sint-Pietersnieuwstraat 41, B-9000 Gent, Belgium
tel: +32 9 264 34 46, fax: +32 9 264 35 93
WWW: http://photonics.intec.UGent.be
email: [email protected]
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