java.lang.IllegalStateException
   at org.netbeans.modules.java.source.parsing.CompilationInfoImpl.getCompilationUnit(CompilationInfoImpl.java:216)
   at org.netbeans.api.java.source.CompilationInfo.getCompilationUnit(CompilationInfo.java:184)
   at org.netbeans.modules.refactoring.java.plugins.CopyClassesRefactoringPlugin$UpdateReferences.run(CopyClassesRefactoringPlugin.java:250)
   at org.netbeans.modules.refactoring.java.plugins.CopyClassesRefactoringPlugin$UpdateReferences.run(CopyClassesRefactoringPlugin.java:231)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:636)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:626)
   at org.netbeans.modules.java.source.parsing.MimeTask.run(MimeTask.java:83)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:609)
   at org.netbeans.modules.parsing.api.ParserManager$MimeTaskAction.run(ParserManager.java:380)
   at org.netbeans.modules.parsing.api.ParserManager$MimeTaskAction.run(ParserManager.java:363)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:204)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:201)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:141)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:88)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:201)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:334)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:409)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:401)
   at org.netbeans.api.java.source.JavaSource.runModificationTask(JavaSource.java:647)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:326)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:287)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:269)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:265)
   at org.netbeans.modules.refactoring.java.plugins.CopyClassesRefactoringPlugin.access$100(CopyClassesRefactoringPlugin.java:81)
   at org.netbeans.modules.refactoring.java.plugins.CopyClassesRefactoringPlugin$CopyClass.performChange(CopyClassesRefactoringPlugin.java:205)
   at org.netbeans.modules.refactoring.api.RefactoringSession.reallyDoRefactoring(RefactoringSession.java:145)
   at org.netbeans.modules.refactoring.api.RefactoringSession.access$100(RefactoringSession.java:79)
   at org.netbeans.modules.refactoring.api.RefactoringSession$1.run(RefactoringSession.java:122)
   at org.netbeans.modules.refactoring.api.RefactoringSession$1.run(RefactoringSession.java:120)
   at org.netbeans.modules.editor.lib.BeforeSaveTasks.runWithOnSaveTasksDisabled(BeforeSaveTasks.java:93)
   at org.netbeans.editor.Utilities.runWithOnSaveTasksDisabled(Utilities.java:1616)
   at org.netbeans.modules.refactoring.api.RefactoringSession.doRefactoring(RefactoringSession.java:120)
   at org.netbeans.modules.refactoring.spi.impl.UndoManager$SessionUndoItem.redo(UndoManager.java:469)
   at org.netbeans.modules.refactoring.spi.impl.UndoManager$2.run(UndoManager.java:298)
   at org.netbeans.modules.refactoring.spi.impl.UndoManager.redo(UndoManager.java:327)
   at org.netbeans.modules.refactoring.spi.impl.RefactoringUndoRedo.redo(RefactoringUndoRedo.java:91)
   at org.openide.actions.UndoRedoAction.actionPerformed(UndoRedoAction.java:230)
   at org.openide.windows.TopComponent.processKeyBinding(TopComponent.java:1176)
   at javax.swing.JComponent.processKeyBindings(JComponent.java:2943)
   at javax.swing.JComponent.processKeyEvent(JComponent.java:2845)
   at org.openide.explorer.view.TreeView$ExplorerTree.processKeyEvent(TreeView.java:1911)
   at java.awt.Component.processEvent(Component.java:6312)
   at java.awt.Container.processEvent(Container.java:2236)
   at java.awt.Component.dispatchEventImpl(Component.java:4891)
   at java.awt.Container.dispatchEventImpl(Container.java:2294)
   at java.awt.Component.dispatchEvent(Component.java:4713)
   at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)
   at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:806)
   at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1074)
   at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:945)
   at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:771)
   at java.awt.Component.dispatchEventImpl(Component.java:4762)
   at java.awt.Container.dispatchEventImpl(Container.java:2294)
   at java.awt.Window.dispatchEventImpl(Window.java:2750)
   at java.awt.Component.dispatchEvent(Component.java:4713)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
   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.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
   at java.awt.EventQueue$4.run(EventQueue.java:731)
   at java.awt.EventQueue$4.run(EventQueue.java:729)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
   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)