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This issue was reported manually by mmirilovic. It already has 20 duplicates Build: NetBeans IDE 7.1.2 (Build 201204101705) VM: Java HotSpot(TM) 64-Bit Server VM, 23.0-b21, Java(TM) SE Runtime Environment, 1.7.0_04-b20 OS: Windows 7 User Comments: GUEST: Ctrl + z GUEST: ctrl+Z is typing GUEST: Occured after applying shortcut. As a result undo failed... GUEST: using Ctrl+Z to undo changes Stacktrace: java.lang.NoClassDefFoundError: org/openide/util/actions/CallableSystemAction$1 at org.openide.util.actions.CallableSystemAction.actionPerformed(CallableSystemAction.java:126) at org.netbeans.modules.editor.NbEditorKit$NbUndoAction.actionPerformed(NbEditorKit.java:570) at org.netbeans.editor.BaseAction.actionPerformed(BaseAction.java:339) at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1661) at javax.swing.JComponent.processKeyBinding(JComponent.java:2879) at javax.swing.JComponent.processKeyBindings(JComponent.java:2926)
Created attachment 119423 [details] stacktrace
*** This bug has been marked as a duplicate of bug 211962 ***