java.lang.NullPointerException
   at org.netbeans.modules.profiler.heapwalk.ui.InstancesListControllerUI$10.valueChanged(InstancesListControllerUI.java:755)
   at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:184)
   at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:164)
   at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:211)
   at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:405)
   at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:415)
   at javax.swing.DefaultListSelectionModel.setSelectionInterval(DefaultListSelectionModel.java:459)
   at javax.swing.DefaultListSelectionModel.addSelectionInterval(DefaultListSelectionModel.java:497)
   at javax.swing.tree.DefaultTreeSelectionModel.resetRowSelection(DefaultTreeSelectionModel.java:777)
   at org.netbeans.lib.profiler.ui.components.JTreeTable$ListToTreeSelectionModelWrapper.resetRowSelection(JTreeTable.java:129)
   at javax.swing.tree.DefaultTreeSelectionModel.setSelectionPaths(DefaultTreeSelectionModel.java:290)
   at javax.swing.JTree.setSelectionPaths(JTree.java:1644)
   at org.netbeans.lib.profiler.ui.components.treetable.TreeTableModelAdapter$6.run(TreeTableModelAdapter.java:349)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
   at java.awt.EventQueue.access$200(EventQueue.java:103)
   at java.awt.EventQueue$3.run(EventQueue.java:694)
   at java.awt.EventQueue$3.run(EventQueue.java:692)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)