java.lang.NullPointerException
   at org.netbeans.modules.editor.NbToolTip.buildTip(NbToolTip.java:244)
   at org.netbeans.modules.editor.NbToolTip.buildToolTip(NbToolTip.java:117)
   at org.netbeans.modules.editor.NbEditorKit$NbBuildToolTipAction.actionPerformed(NbEditorKit.java:984)
   at org.netbeans.editor.BaseAction.actionPerformed(BaseAction.java:339)
   at org.netbeans.spi.editor.AbstractEditorAction.actionPerformed(AbstractEditorAction.java:462)
   at org.netbeans.editor.ext.ToolTipSupport.updateToolTip(ToolTipSupport.java:571)
   at org.netbeans.editor.ext.ToolTipSupport.setToolTipVisible(ToolTipSupport.java:636)
   at org.netbeans.editor.ext.ToolTipSupport.setToolTipVisible(ToolTipSupport.java:594)
   at org.netbeans.editor.ext.ToolTipSupport$Listener.actionPerformed(ToolTipSupport.java:1126)
   at org.netbeans.editor.WeakTimerListener.actionPerformed(WeakTimerListener.java:88)
   at javax.swing.Timer.fireActionPerformed(Timer.java:313)
   at javax.swing.Timer$DoPostEvent.run(Timer.java:245)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
   at java.awt.EventQueue.access$500(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:709)
   at java.awt.EventQueue$3.run(EventQueue.java:703)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)