Hi. I am in the process of moving our mediawiki to a new server, in accordance with this guide: http://www.mediawiki.org/wiki/Manual:Moving_a_wiki So I made a backup and started to upgrade the mediawiki installation to version 1.21.1 My current setup is: Mediawiki version 1.15.1 PHP version: 5.3.10 MySQL version: 5.5.29

So when I run Php update.php

I get the following output: ...batch conversion of user_options: PHP Notice: Undefined variable: cache in /etc/mediawiki/languages/Language.php on line 2378 PHP Notice: Use of undefined constant MW_MATH_PNG - assumed 'MW_MATH_PNG' in /etc/mediawiki/languages/messages/MessagesEn.php on line 110 PHP Notice: Use of undefined constant MW_MATH_SIMPLE - assumed 'MW_MATH_SIMPLE' in /etc/mediawiki/languages/messages/MessagesEn.php on line 111 PHP Notice: Use of undefined constant MW_MATH_HTML - assumed 'MW_MATH_HTML' in /etc/mediawiki/languages/messages/MessagesEn.php on line 112 PHP Notice: Use of undefined constant MW_MATH_SOURCE - assumed 'MW_MATH_SOURCE' in /etc/mediawiki/languages/messages/MessagesEn.php on line 113 PHP Notice: Use of undefined constant MW_MATH_MODERN - assumed 'MW_MATH_MODERN' in /etc/mediawiki/languages/messages/MessagesEn.php on line 114 PHP Notice: Use of undefined constant MW_MATH_MATHML - assumed 'MW_MATH_MATHML' in /etc/mediawiki/languages/messages/MessagesEn.php on line 115 PHP Fatal error: Call to undefined method Language::needsGenderDistinction() in /var/lib/mediawiki/includes/Title.php on line 729

Before the upgrade process ends. I've looked around for a similar error, but haven't found a similar error, what might be the problem?

Mvh. / Best regards, Mads Boye - HPC & Vmware System Administrator,

IST - Information Services Technology Email: mb@ist.aau.dkmailto:mb@ist.aau.dk Faculties of Engineering and Science Room: 4.2.46 Aalborg University Direct Phone: (+45) 9940 3453 Selma Lagerlöfsvej 300, DK-9220 Aalborg Ø