java.lang.ClassCastException: java.net.URL cannot be cast to org.openide.loaders.DataObject
	at org.netbeans.api.java.source.support.OpenedEditors.getFileObject(OpenedEditors.java:160)
	at org.netbeans.api.java.source.support.OpenedEditors.stateChanged(OpenedEditors.java:135)
	at org.netbeans.api.java.source.support.OpenedEditors$1.propertyChange(OpenedEditors.java:83)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
	at org.netbeans.api.editor.EditorRegistry.firePropertyChange(EditorRegistry.java:307)
	at org.netbeans.api.editor.EditorRegistry.focusLost(EditorRegistry.java:255)
	at org.netbeans.api.editor.EditorRegistry$FocusL.focusLost(EditorRegistry.java:377)
	at java.awt.AWTEventMulticaster.focusLost(AWTEventMulticaster.java:213)
	at java.awt.Component.processFocusEvent(Component.java:5930)
	at java.awt.Component.processEvent(Component.java:5794)
	at java.awt.Container.processEvent(Container.java:2058)
	at java.awt.Component.dispatchEventImpl(Component.java:4410)
	at java.awt.Container.dispatchEventImpl(Container.java:2116)
	at java.awt.Component.dispatchEvent(Component.java:4240)
	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1848)
	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:882)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:555)
	at java.awt.Component.dispatchEventImpl(Component.java:4282)
	at java.awt.Container.dispatchEventImpl(Container.java:2116)
	at java.awt.Component.dispatchEvent(Component.java:4240)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
	at java.awt.SentEvent.dispatch(SentEvent.java:55)
	at java.awt.DefaultKeyboardFocusManager$DefaultKeyboardFocusManagerSentEvent.dispatch(DefaultKeyboardFocusManager.java:177)
	at java.awt.DefaultKeyboardFocusManager.sendMessage(DefaultKeyboardFocusManager.java:204)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:620)
	at java.awt.Component.dispatchEventImpl(Component.java:4282)
	at java.awt.Container.dispatchEventImpl(Container.java:2116)
	at java.awt.Window.dispatchEventImpl(Window.java:2429)
	at java.awt.Component.dispatchEvent(Component.java:4240)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
[catch] at java.awt.SequencedEvent.dispatch(SequencedEvent.java:98)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
	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)


java.lang.ClassCastException: javax.swing.text.html.HTMLDocument cannot be cast to org.netbeans.editor.BaseDocument
	at org.netbeans.editor.BaseCaret.setDot(BaseCaret.java:974)
	at org.netbeans.editor.BaseCaret.setDot(BaseCaret.java:1028)
	at org.netbeans.editor.BaseCaret.setDot(BaseCaret.java:945)
	at javax.swing.text.JTextComponent.setCaretPosition(JTextComponent.java:1652)
[catch] at org.netbeans.modules.java.navigation.HTMLDocView$1.run(HTMLDocView.java:87)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
	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)