GUIChooser+starts+but+not+Experimenter+or+Explorer

= GUIChooser starts but not Experimenter or Explorer = The GUIChooser starts, but Explorer and Experimenter don't start and output an Exception like this in the terminal: code format="text" /usr/share/themes/Mist/gtk-2.0/gtkrc:48: Engine "mist" is unsupported, ignoring ---Registering Weka Editors--- java.lang.NullPointerException at weka.gui.explorer.PreprocessPanel.addPropertyChangeListener(PreprocessPanel.java:519) at javax.swing.plaf.synth.SynthPanelUI.installListeners(SynthPanelUI.java:49) at javax.swing.plaf.synth.SynthPanelUI.installUI(SynthPanelUI.java:38) at javax.swing.JComponent.setUI(JComponent.java:652) at javax.swing.JPanel.setUI(JPanel.java:131) ... code This behavior happens only under Java 5/6 and Gnome/Linux, KDE doesn't produce this error. The reason for this is, that Weka tries to look more "native" and therefore sets a platform-specific Swing theme. Unfortunately, this doesn't seem to be working correctly in Java 5/6 together with Gnome. A workaround for this is to set the cross-platform //Metal// theme.

In order to use another theme one only has to create the following properties file in ones home directory: code format="text" LookAndFeel.props code With this content: code format="ini" Theme=javax.swing.plaf.metal.MetalLookAndFeel code More information can be found in [|this Weka list post] or here.