javax.swing.undo.CannotRedoException
   at org.netbeans.editor.BaseDocumentEvent.redo(BaseDocumentEvent.java:342)
   at org.netbeans.editor.GuardedDocumentEvent.redo(GuardedDocumentEvent.java:81)
   at javax.swing.undo.CompoundEdit.redo(CompoundEdit.java:59)
   at org.netbeans.editor.BaseDocument$AtomicCompoundEdit.redo(BaseDocument.java:2248)
   at org.openide.text.CloneableEditorSupport$FilterUndoableEdit.redo(CloneableEditorSupport.java:3047)
   at javax.swing.undo.UndoManager.redoTo(UndoManager.java:336)
   at javax.swing.undo.UndoManager.redo(UndoManager.java:443)
   at org.openide.awt.UndoRedo$Manager.redo(UndoRedo.java:190)
   at org.openide.text.CloneableEditorSupport$UndoGroupManager.redo(CloneableEditorSupport.java:3669)
   at org.openide.text.CloneableEditorSupport$CESUndoRedoManager.access$3201(CloneableEditorSupport.java:3226)
   at org.openide.text.CloneableEditorSupport$CESUndoRedoManager$RenderUndo.run(CloneableEditorSupport.java:3394)
   at org.netbeans.editor.GuardedDocument.runAtomic(GuardedDocument.java:314)
   at org.openide.text.CloneableEditorSupport$CESUndoRedoManager$RenderUndo.<init>(CloneableEditorSupport.java:3375)
   at org.openide.text.CloneableEditorSupport$CESUndoRedoManager$RenderUndo.<init>(CloneableEditorSupport.java:3366)
   at org.openide.text.CloneableEditorSupport$CESUndoRedoManager$RenderUndo.<init>(CloneableEditorSupport.java:3362)
   at org.openide.text.CloneableEditorSupport$CESUndoRedoManager.redo(CloneableEditorSupport.java:3243)
   at org.openide.actions.RedoAction.performAction(RedoAction.java:106)
   at org.openide.util.actions.CallableSystemAction$1.run(CallableSystemAction.java:129)
   at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:95)
   at org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:116)
   at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:99)
   at org.openide.util.actions.CallableSystemAction.actionPerformed(CallableSystemAction.java:126)
   at org.netbeans.modules.editor.NbEditorKit$NbRedoAction.actionPerformed(NbEditorKit.java:584)
   at org.netbeans.editor.BaseAction.actionPerformed(BaseAction.java:339)
   at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1639)
   at javax.swing.JComponent.processKeyBinding(JComponent.java:2851)
   at javax.swing.JComponent.processKeyBindings(JComponent.java:2886)
   at javax.swing.JComponent.processKeyEvent(JComponent.java:2814)
   at java.awt.Component.processEvent(Component.java:6066)
   at java.awt.Container.processEvent(Container.java:2041)
   at java.awt.Component.dispatchEventImpl(Component.java:4652)
   at java.awt.Container.dispatchEventImpl(Container.java:2099)
   at java.awt.Component.dispatchEvent(Component.java:4482)
   at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1850)
   at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:712)
   at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:990)
   at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:855)
   at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:676)
   at java.awt.Component.dispatchEventImpl(Component.java:4524)
   at java.awt.Container.dispatchEventImpl(Container.java:2099)
   at java.awt.Window.dispatchEventImpl(Window.java:2478)
   at java.awt.Component.dispatchEvent(Component.java:4482)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:644)
   at java.awt.EventQueue.access$000(EventQueue.java:85)
   at java.awt.EventQueue$1.run(EventQueue.java:603)
   at java.awt.EventQueue$1.run(EventQueue.java:601)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
   at java.awt.EventQueue$2.run(EventQueue.java:617)
   at java.awt.EventQueue$2.run(EventQueue.java:615)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:614)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:148)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)