java.lang.NullPointerException
	at org.netbeans.api.java.refactoring.RenameRefactoring.isOverridden(RenameRefactoring.java:260)
	at org.netbeans.api.java.refactoring.RenameRefactoring.preCheck(RenameRefactoring.java:79)
	at org.netbeans.modules.javaui.refactoring.RefactoringPanel.refresh(RefactoringPanel.java:283)
	at org.netbeans.modules.javaui.refactoring.RefactoringPanel.<init>(RefactoringPanel.java:78)
	at org.netbeans.api.javaui.refactoring.AbstractRefactoringAction.run(AbstractRefactoringAction.java:95)
	at org.netbeans.api.javaui.refactoring.AbstractRefactoringAction.actionPerformed(AbstractRefactoringAction.java:66)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1786)
	at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1839)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
	at javax.swing.AbstractButton.doClick(AbstractButton.java:289)
	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1113)
	at javax.swing.plaf.basic.BasicMenuItemUI$MouseInputHandler.mouseReleased(BasicMenuItemUI.java:943)
	at java.awt.Component.processMouseEvent(Component.java:5100)
	at java.awt.Component.processEvent(Component.java:4897)
	at java.awt.Container.processEvent(Container.java:1569)
	at java.awt.Component.dispatchEventImpl(Component.java:3615)
	at java.awt.Container.dispatchEventImpl(Container.java:1627)
	at java.awt.Component.dispatchEvent(Component.java:3477)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3483)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3198)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3128)
	at java.awt.Container.dispatchEventImpl(Container.java:1613)
	at java.awt.Window.dispatchEventImpl(Window.java:1606)
	at java.awt.Component.dispatchEvent(Component.java:3477)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
***********************************************************************************************************************
java.lang.NullPointerException
	at org.netbeans.modules.classmodel.jmiimpl.project.ClassPathImpl.getRecursiveSubclasses(ClassPathImpl.java:242)
	at org.netbeans.modules.classmodel.jmiimpl.project.ClassPathImpl.getFeatureUsages(ClassPathImpl.java:280)
	at org.netbeans.jmi.java.project.ClassPath$Impl.getFeatureUsages(Unknown Source)
	at org.netbeans.modules.java.refactoring.NbAbstractRefactoring.collectUsages(NbAbstractRefactoring.java:86)
	at org.netbeans.api.java.refactoring.WhereUsedQuery.prepare(WhereUsedQuery.java:66)
	at org.netbeans.api.javaui.refactoring.ParametersPanel.showDialog(ParametersPanel.java:182)
	at org.netbeans.modules.javaui.refactoring.RefactoringPanel.refresh(RefactoringPanel.java:294)
	at org.netbeans.modules.javaui.refactoring.RefactoringPanel.<init>(RefactoringPanel.java:78)
	at org.netbeans.api.javaui.refactoring.AbstractRefactoringAction.run(AbstractRefactoringAction.java:95)
	at org.netbeans.api.javaui.refactoring.AbstractRefactoringAction.actionPerformed(AbstractRefactoringAction.java:66)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1786)
	at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1839)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
	at javax.swing.AbstractButton.doClick(AbstractButton.java:289)
	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1113)
	at javax.swing.plaf.basic.BasicMenuItemUI$MouseInputHandler.mouseReleased(BasicMenuItemUI.java:943)
	at java.awt.Component.processMouseEvent(Component.java:5100)
	at java.awt.Component.processEvent(Component.java:4897)
	at java.awt.Container.processEvent(Container.java:1569)
	at java.awt.Component.dispatchEventImpl(Component.java:3615)
	at java.awt.Container.dispatchEventImpl(Container.java:1627)
	at java.awt.Component.dispatchEvent(Component.java:3477)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3483)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3198)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3128)
	at java.awt.Container.dispatchEventImpl(Container.java:1613)
	at java.awt.Window.dispatchEventImpl(Window.java:1606)
	at java.awt.Component.dispatchEvent(Component.java:3477)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)