In my Windows build of emacs, when I put the cursor in a latex equation and run
M-x org-toggle-latex-fragment
then things chug along for a second but then fail. In the *Org Preview LaTex Output* buffer, I see the message:
This is dvipng 1.15 Copyright 2002-2015 Jan-Ake Larsson
[1
dvipng: Fatal error, cannot open output file c:/Users/scott/AppData/Local/Temp/"orgtex4628hQG.png
The reason for the failure is the leftover quote (...Temp/"orgtex...) in the expected png output file. With some hackery, I can see that the command that's being run is:
dvipng -fg "rgb 0 0 0" -bg "rgb 1 1 1" -D "102.0" -T tight -o "c:/Users/scott/AppData/Local/Temp/""orgtex4628hQG".png "c:/Users/scott/AppData/Local/Temp/orgtex4628hQG.dvi"
If I paste that into a cygwin xterm, it runs fine on the .dvi file that's still in the Temp directory. But the command fails in a Windows cmd window; if I remove the extra quotes, then the command works in the cmd window too.
The extra quote comes from the default customization for the dvipng image-converter field of org-preview-latex-process-alist:
dvipng -fg %F -bg %B -D %D -T tight -o %o%b.png %f
where the %o%b part of the customization concatenates two strings that are already quoted. That's OK for *nix but apparently not for Windows.
I don't see a way to change the customization to fix this; can anyone take a look at the elisp?
Thanks,
Scott
--- A test org file --------------
* Put cursor in the equation below and type C-c C-x C-l
\[
e^{i\pi} = -1
\]
--- My setup ---------------
Emacs : GNU Emacs 25.1.1 (i686-w64-mingw32) of 2016-09-17
Package: Org mode version 9.0.1 (9.0.1-elpaplus @ c:/Users/scott/OneDrive/scotto/.emacs.d/elpa/org-plus-contrib-20161118/)
current state:
==============
(too huge to send)