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I've run into a very strange issue with Org-mode 8.2.10 footnotes. Given the following text, where | represents point and [empty-line] represents an empty line,

[empty-line]

Foo bar baz =$= | foo bar baz

[empty-line]

It is not possible to insert a footnote at point, any position on the line after point, or on the immediately following line. Cannot insert a footnote here is displayed when typingC-c C-x f.

If the ='s are removed, inserting footnotes works fine.

Has anyone encountered this before? I'm guessing that it has something to do with the $ being a LaTeX operator?

  • Indeed. As a workaround, you can add a space between $ and =, insert the footnote, then remove the space. – JeanPierre Mar 20 '16 at 6:59
  • I edited your post based on what I think you're doing, feel free to revert if I'm wrong. – JeanPierre Mar 20 '16 at 7:04
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It seems to work in Org Mode 8.3.4 without any problems.

  • Alright then, I'll guess I'll eventually upgrade...eventually. – Tianxiang Xiong Mar 20 '16 at 8:13
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Indeed, it is discussed in this message from 2011:

For what it's worth, this not directly related to footnotes. It's a weakness in `org-inside-LaTeX-fragment-p', which returns a non-nil value after =\begin{document}= instead of nil. And, obviously, one cannot add a footnote inside a LaTeX fragment...

I didn't find any mention of this problem in the commit logs but I suspect this has been fixed by commit 176681bc65b5c787dc0737ccd523afd19b7ea4c0 (2015-02-15) where the call to org-footnote-in-valid-context-p has been replaced by one to the new function org-footnote--allow-reference-p.

As a workaround before upgrading, you can temporarily add a space between $ and =, insert the footnote, then remove the space.

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