Thread:Project:Support desk/update from version 1.12.0 to 1.19.2 gives an error

Hi, we are running mediawiki for a couple of years now and want to upgrade to a newer version of the wiki. Current version: 1.12.0 PHP: 5.2.6 MySQL 5.051B

So i've set up a test environment to perform the upgrade with the exact same conditions as it is running live on our server. I've secured the files like they are pointed at in the upgrade text file, copied the new version in the right folder and i get this message.

Fatal error: Cannot redeclare wfprofilein (previously declared in C:\xampp\htdocs\includes\profiler\Profiler.php:14) in C:\xampp\htdocs\includes\ProfilerStub.php on line 12

As far as i can understand, the funtion is double assigned and that is not possible. How can i resolve this problem?

Thnx 4 the help! Dennis