Thread:Project:Support desk/Problems upgrading to Mediawiki 1.19.1

Hi there

Have encountered problems upgrading mediawiki. I have been using version 1.15.1 and have just tried to upgrade to 1.19.1. It's hosted on a cPanel account running mySQL 5.0.95-community and php 5.2.10. Basically, I have : 1. Backed up the database. 2. Copied all image files, extensions and local setting files. 3. Unpacked the tar file. 4. Copied and overwritten the extracted files into the old wiki folder. 5. When trying to run http://simon-jones.staff.shef.ac.uk/wiki/mw-config/index.php, I get the error Fatal error: Cannot redeclare wfprofilein (previously declared in /webusers/ch1sj/public_html/wiki/includes/profiler/Profiler.php:14) in /webusers/ch1sj/public_html/wiki/includes/ProfilerStub.php on line 24 6. Looking on the web, there are several reccomendations to rename StartProfiler.php to StartProfiler.old.php. 7. Having done this, I now get the message Fatal error: Class 'Language' not found in /webusers/ch1sj/public_html/wiki/includes/Setup.php on line 473

Now I'm stuck. Any help gratefully appreciated. SJ