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Re: [O] help debugging latex-overlays boxes

From: John Kitchin
Subject: Re: [O] help debugging latex-overlays boxes
Date: Tue, 09 Sep 2014 09:45:38 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4.50 (darwin)

Nick Dokos <address@hidden> writes:

I have traced my problem. The issue is in the function
org-preview-latex-fragment. At the end of the function, where it calls
org-format-latex, the default-directory variable that is used in the
function call has a value of

The YUYUA~1 is causing the problem.

I do not understand why the full path, "c:/Users/Yuyu
Yao/AppData/Local/Temp" is not showing up here. When I examine the
default-directory variable in a buffer in that directory, that is what
comes up. It is only inside the org function it gets chomped to what
looks like an old DOS format.

Anyway, latex cannot handle that path, so no dvi is produced, and no

otherwise the latex file is produced, and it compiles fine with the full
path. Any ideas on how to fix that? Thanks,

> John Kitchin <address@hidden> writes:
>> Hi All,
>> I am using org-mode in a course this fall with 60 students.  All of them
>> are using org-mode from elpa. For about 10 of them, they are unable to
>> toggle the latex-overlays; instead of getting the equations, they get
>> empty gray boxes with an error that the png file was not created.  Oddly
>> enough, they can export to PDF just fine. I have also checked that they
>> have LaTeX (TeXLive) installed, and it appears it is. I am able to
>> convert tex files to dvi, and then use dvipng to make a png image. But
>> for some reason, the toggle-latex-overlay function does not work for
>> them.
>> I am at a loss to figure out what the issue is. These are Windows
>> laptops that were preconfigured by the department. Almost all of them
>> work fine, except for this small number I cannot figure out.
>> Any ideas? Thanks,
> I would edebug-defun the function org-create-formula-image and step
> through it to make sure that it goes the way you want (are you sure you
> are using the dvipng method on these machines? maybe you are using the
> imagemagick method but the program has not been installed?  Check the
> value of org-latex-create-formula-image-program).
> While you are stepping you can also check the variables in the function
> and see e.g. what the output file name is.
> If that goes OK, then I would edebug-defun
> org-create-formula-image-with-dvipng next and check the latex input file
> it produces. Make sure that things like minted which require
> --shell-escape are *not* included in that input file: it's processed by
> a hard-wired call to latex (without --shell-escape) , so minted will
> cause a failure. If that is the case, check org-latex-packages-alist and
> make sure that minted's snippet-flag is nil.
> HTH,
> Nick

John Kitchin
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213

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