I built a live install cd with xfce as the desktop ; One of the packages I selected was for Qt. The install worked fine but when I try to start the install software program [yast2 --install] I get a message could not load plugin qt_pkg. How would I tell the yast2 to ignore the plugin/not to load the plugin??

Looks like there’s something missing in the XFCE install. It needs the plugin to run a QT application.

Open the software installer, check ‘File list’ in the search view and search for qt_pkg. It will show the package containing the file. Install it/them and problem should be solved.