Question

I have got through installing the LatexModePlugin and solved a bunch of path issues. It nolonger produces errors but the final png image that is produce is empty.

Any ideas what I'm doing wrong? I just upgraded to the latest version and its still doing it.

Environment

-- TWikiGuest - 26 Mar 2006

Answer

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My best advice is to turn the debug mode on, and try to track down the failure in the image generation chain:

• tmp directory created?
• twiki_math.tex created?
• twiki_math.tex file processed successfully?
• output images found in tmp dir?

If the twiki_math.tex file is created, one should be able to perform latex twiki_math.tex, dvips twiki_math.dvi, and convert -trim ps:twiki_math.ps image.png, outside of twiki. This way, you can confirm that the back end rendering is functioning properly.

-- ScottHoge - 27 Mar 2006

The images do get created so everything else seems ok. I'd like to look at the tex and do what you suggest but I can't find it. Where do the plugin save the .tex file and won't it be deleted?

-- TWikiGuest - 28 Mar 2006

On solaris, the twiki_math.tex file should be created in a subdirectory of /tmp/. You can over-ride this by hard coding a directory for LATEXWDIR in the LatexModePlugin.pm file. If debug mode is set on, the temporary files will not be deleted at the end of the script-run.

You say that images are created, but they are blank? Would you be willing to post one here?

Also, what version of the convert are you using?

-- ScottHoge - 28 Mar 2006

-- TWikiGuest - 28 Mar 2006

Thanks for the advice, I don't have system control over the machines this is running on, but the tech people who set up the twiki didn't install this plugin. So it could be thats part of the problem. there are no tex files created in the /tmp directory. I tried setting it to another one but it couldn't write there even with chmod777. We have ImageMagick 5.4.7.4 I can't upload the image since they are zero size. If you're interested here is the url of the page http://uai.cs.ubc.ca/cgi-bin/twiki/view/Main/MarkCrowley?latex=rerender

-- TWikiGuest - 28 Mar 2006

I took a look at the link, and the images are definitely not created. With the error messages only reported on preview, it's tough on this end to say what is incorrect in the setup.

-- ScottHoge - 30 Mar 2006