From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ken Mankoff <mankoff@gmail.com>
Subject: Re: \input causes conflict with LaTeX equation preview
Date: Mon, 20 Oct 2014 21:33:11 -0400
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* On 2014-10-20 at 18:26, Rasmus wrote:
> Ken Mankoff <mankoff@gmail.com> writes:
>
>> I have
>>
>> #+LATEX_HEADER: \input{preamble}
>>
>> in an Org file. When I try to preview equations, it does not work
>> because "\input{preamble}" is exported to the equation preview
>> preamble, but no file "preamble.tex" is exported. The "preamble.tex"
>> file is not needed just to preview an equation.
>>
>> Can anyone suggest a work-around?
>
> \IfFileExists{./preamble.tex}{true}{false}
>
> Etoolbox has a number of nice tests for more sophisticated
> conditioning.
>

Works great. Thank you.

  -k.