java.lang.IllegalStateException: This must happen in the event thread!
        at org.openide.awt.Actions$Bridge.propertyChange(Actions.java:341)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSup
port.java:252)
        at org.openide.util.SharedClassObject.firePropertyChange(SharedClassObje
ct.java:386)
        at org.openide.util.SharedClassObject.putProperty(SharedClassObject.java
:276)
        at org.openide.util.actions.SystemAction.setEnabled(SystemAction.java:10
1)
        at org.openide.util.actions.CallbackSystemAction.updateEnabled(CallbackS
ystemAction.java:126)
        at org.openide.util.actions.CallbackSystemAction.access$200(CallbackSyst
emAction.java:53)
        at org.openide.util.actions.CallbackSystemAction$ActionDelegateListener.
propertyChange(CallbackSystemAction.java:386)
        at javax.swing.event.SwingPropertyChangeSupport.firePropertyChange(Swing
PropertyChangeSupport.java:264)
        at javax.swing.event.SwingPropertyChangeSupport.firePropertyChange(Swing
PropertyChangeSupport.java:232)
        at javax.swing.AbstractAction.firePropertyChange(AbstractAction.java:178
)
        at javax.swing.AbstractAction.setEnabled(AbstractAction.java:138)
        at org.openide.explorer.ExplorerActionsImpl$OwnPaste.setPasteTypes(Explo
rerActionsImpl.java:405)
        at org.openide.explorer.ExplorerActionsImpl.updatePasteTypes(ExplorerAct
ionsImpl.java:292)
        at org.openide.explorer.ExplorerActionsImpl.updatePasteAction(ExplorerAc
tionsImpl.java:280)
        at org.openide.explorer.ExplorerActionsImpl.access$300(ExplorerActionsIm
pl.java:48)
        at org.openide.explorer.ExplorerActionsImpl$ActionStateUpdater.clipboard
Changed(ExplorerActionsImpl.java:619)
        at sun.reflect.GeneratedMethodAccessor40.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at org.openide.util.WeakListenerImpl$ProxyListener.invoke(WeakListenerIm
pl.java:383)
        at $Proxy9.clipboardChanged(Unknown Source)
        at org.openide.util.datatransfer.ExClipboard.fireClipboardChange(ExClipb
oard.java:60)
        at org.netbeans.core.NbClipboard.run(NbClipboard.java:149)
        at org.openide.util.Task.run(Task.java:136)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:330)

        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java
:686)
Warning - org.netbeans.modules.text.ConvertToTextAction should override Callable
SystemAction.asynchronous() to return false