Exception encountered, of type "Error"<br />
[90972f0d] /index.php?title=%D0%A4%D0%B0%D0%B9%D0%BB:%D0%97%D0%B0%D0%B4%D0%B0%D1%87%D0%B0_graph-coloring-smallest-last-not-good_ex2.png&amp;action=export2oo   Error from line 229 of /var/www/discopal/actual/extensions/DocExport/DocExport.php: Call to undefined function wfMessageNoTrans()<br />
Backtrace:<br />
#0 /var/www/discopal/actual/extensions/DocExport/DocExport.php(144): DocExport::sendTo(ImagePage, string)<br />
#1 /var/www/discopal/actual/includes/Hooks.php(201): DocExport::onUnknownAction(string, ImagePage)<br />
#2 /var/www/discopal/actual/includes/MediaWiki.php(494): Hooks::run(string, array)<br />
#3 /var/www/discopal/actual/includes/MediaWiki.php(287): MediaWiki-&gt;performAction(ImagePage, Title)<br />
#4 /var/www/discopal/actual/includes/MediaWiki.php(714): MediaWiki-&gt;performRequest()<br />
#5 /var/www/discopal/actual/includes/MediaWiki.php(508): MediaWiki-&gt;main()<br />
#6 /var/www/discopal/actual/index.php(41): MediaWiki-&gt;run()<br />
#7 {main}<br />