java.lang.NullPointerException
        at org.netbeans.api.autoupdate.UpdateElement.getUpdateUnitProvider(UpdateElement.java:143)
        at org.netbeans.api.autoupdate.UpdateElement.getSourceCategory(UpdateElement.java:134)
        at org.netbeans.modules.autoupdate.ui.Unit$Available.getSourceCategory(Unit.java:580)
        at org.netbeans.modules.autoupdate.ui.UnitDetails.setUnit(UnitDetails.java:85)
        at org.netbeans.modules.autoupdate.ui.UnitTab.showDetailsAtRow(UnitTab.java:509)
        at org.netbeans.modules.autoupdate.ui.UnitTab.access$1700(UnitTab.java:112)
        at org.netbeans.modules.autoupdate.ui.UnitTab$9.valueChanged(UnitTab.java:537)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:167)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:147)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:194)
        at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:388)
        at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:398)
        at javax.swing.DefaultListSelectionModel.setSelectionInterval(DefaultListSelectionModel.java:442)
        at org.netbeans.modules.autoupdate.ui.PluginManagerUI.selectFirstRow(PluginManagerUI.java:562)
        at org.netbeans.modules.autoupdate.ui.PluginManagerUI.refreshUnits(PluginManagerUI.java:594)
        at org.netbeans.modules.autoupdate.ui.PluginManagerUI.access$200(PluginManagerUI.java:78)
        at org.netbeans.modules.autoupdate.ui.PluginManagerUI$4.run(PluginManagerUI.java:228)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:199)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused: java.lang.reflect.InvocationTargetException
        at java.awt.EventQueue.invokeAndWait(EventQueue.java:997)
        at javax.swing.SwingUtilities.invokeAndWait(SwingUtilities.java:1323)
        at org.netbeans.modules.autoupdate.ui.PluginManagerUI.initialize(PluginManagerUI.java:226)
        at org.netbeans.modules.autoupdate.ui.PluginManagerUI.access$000(PluginManagerUI.java:78)
        at org.netbeans.modules.autoupdate.ui.PluginManagerUI$1.run(PluginManagerUI.java:124)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:576)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1013)