java.lang.NullPointerException
   at org.netbeans.modules.nbexpose.ExposeTableModel$1.propertyChange(ExposeTableModel.java:38)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
   at org.netbeans.core.windows.RegistryImpl.doFirePropertyChange(RegistryImpl.java:316)
   at org.netbeans.core.windows.RegistryImpl.access$000(RegistryImpl.java:64)
   at org.netbeans.core.windows.RegistryImpl$1.run(RegistryImpl.java:168)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)