This is most likely what is covered in the readme file. Read the troubleshooting section, you need to install AMS. http://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/math/README?view=mark...
~Daniel Friesen(Dantman) of The Gaiapedia, Wikia Graphical Entertainment Project, and Wiki-Tools.com
Bruno Goncalves wrote:
Dear All,
I've just finished installing mediawiki. Everything went fine, except for the TeX configuration... I've successfully compiled texvc and it runs correctly from the command line. However, typing
<math>\sqrt{n}</math>
in a post, results in:
*Failed to parse (unknown error): \sqrt{n}*** I've set $wgTexvc, $wgUseTeX and $wgEnableUploads. Am I missing something? Sincerely,
Bruno