Before running this software, you need to configure it first. This is best to be done with `install_umark_data.sh' script, which is installed here: /usr/X11R6/share/umark/install_umark_data.sh It should be run from /usr/X11R6/share/umark. If you want to manually configure the UT200x install paths, you may edit your ~/.umarkrc file. The ~/.umarkrc file format is as follows (in order): BuildNumber|/UT2003/Retail/install/path BuildNumber|/UT2004/Retail/install/path BuildNumber|/UT2003/Demo/install/path BuildNumber|/UT2004/Demo/install/path If one of the lines says "n/a|n/a", it means that `install_umark_data.sh' did not find where the respective version of the game is installed. In this case, you should manually enter the game build number and root installation path.