* On 2014-10-20 at 18:26, Rasmus wrote:
> Ken Mankoff <mank...@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.
