java.lang.NullPointerException
   at org.netbeans.api.java.source.SourceUtils.getDependentRootsImpl(SourceUtils.java:728)
   at org.netbeans.api.java.source.SourceUtils.getDependentRoots(SourceUtils.java:717)
   at org.netbeans.modules.refactoring.java.RetoucheUtils.getClasspathInfoFor(RetoucheUtils.java:614)
   at org.netbeans.modules.refactoring.java.ui.RenameRefactoringUI.<init>(RenameRefactoringUI.java:153)
   at org.netbeans.modules.refactoring.java.ui.RefactoringActionsProvider$1.createRefactoringUI(RefactoringActionsProvider.java:136)
   at org.netbeans.modules.refactoring.java.ui.RefactoringActionsProvider$TextComponentTask.run(RefactoringActionsProvider.java:730)
   at org.netbeans.modules.refactoring.java.ui.RefactoringActionsProvider$TextComponentTask.run(RefactoringActionsProvider.java:699)
   at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:466)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:129)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:113)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:190)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:99)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:421)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:392)
   at org.netbeans.modules.refactoring.java.ui.RefactoringActionsProvider$TextComponentTask.run(RefactoringActionsProvider.java:736)
   at org.netbeans.modules.refactoring.java.RetoucheUtils.invokeAfterScanFinished(RetoucheUtils.java:952)
   at org.netbeans.modules.refactoring.java.ui.RefactoringActionsProvider.doRename(RefactoringActionsProvider.java:194)
   at org.netbeans.modules.refactoring.api.impl.ActionsImplementationFactory.doRename(ActionsImplementationFactory.java:83)
   at org.netbeans.modules.refactoring.spi.impl.RenameAction.performAction(RenameAction.java:62)
   at org.netbeans.modules.refactoring.spi.impl.RefactoringGlobalAction.performAction(RefactoringGlobalAction.java:132)
   at org.openide.util.actions.NodeAction.performAction(NodeAction.java:296)
   at org.openide.util.actions.CallableSystemAction$1.run(CallableSystemAction.java:127)
   at org.netbeans.modules.openide.util.ActionsBridge.implPerformAction(ActionsBridge.java:83)
   at org.netbeans.modules.openide.util.ActionsBridge.doPerformAction(ActionsBridge.java:64)
   at org.openide.util.actions.CallableSystemAction.actionPerformed(CallableSystemAction.java:123)
   at org.openide.util.actions.NodeAction.actionPerformed(NodeAction.java:284)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
   at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
   at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
   at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1220)
   at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1261)
   at java.awt.Component.processMouseEvent(Component.java:6041)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
   at java.awt.Component.processEvent(Component.java:5806)
   at java.awt.Container.processEvent(Container.java:2058)
   at java.awt.Component.dispatchEventImpl(Component.java:4413)
   at java.awt.Container.dispatchEventImpl(Container.java:2116)
   at java.awt.Component.dispatchEvent(Component.java:4243)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4322)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:3986)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:3916)
   at java.awt.Container.dispatchEventImpl(Container.java:2102)
   at java.awt.Window.dispatchEventImpl(Window.java:2440)
   at java.awt.Component.dispatchEvent(Component.java:4243)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:125)
   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)