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When clicking the table rows in the property editor I get the following stack trace printed on the output window: java.lang.IllegalStateException: This must happen in the event thread! at org.openide.awt.Actions$Bridge.propertyChange (Actions.java:281) at java.beans.PropertyChangeSupport.firePropertyChang e(PropertyChangeSupport.java:252) at org.openide.util.SharedClassObject.firePropertyCha nge(SharedClassObject.java:386) at org.openide.util.SharedClassObject.putProperty (SharedClassObject.java:276) at org.openide.util.actions.SystemAction.setEnabled (SystemAction.java:108) at org.openide.util.actions.CallbackSystemAction.upda teEnabled(CallbackSystemAction.java:140) at org.openide.util.actions.CallbackSystemAction.setA ctionPerformer(CallbackSystemAction.java:118) at org.netbeans.modules.properties.PropertiesOpen$3.r un(PropertiesOpen.java:845) at org.openide.util.Task.run (Task.java:136) at org.openide.util.RequestProcessor$Task.run (RequestProcessor.java:330) at org.openide.util.RequestProcessor$Processor.run (RequestProcessor.java:680) java.lang.IllegalStateException: This must happen in the event thread! at org.openide.awt.Actions$Bridge.propertyChange (Actions.java:281) at java.beans.PropertyChangeSupport.firePropertyChang e(PropertyChangeSupport.java:252) at org.openide.util.SharedClassObject.firePropertyCha nge(SharedClassObject.java:386) at org.openide.util.SharedClassObject.putProperty (SharedClassObject.java:276) at org.openide.util.actions.SystemAction.setEnabled (SystemAction.java:108) at org.openide.util.actions.CallbackSystemAction.upda teEnabled(CallbackSystemAction.java:140) at org.openide.util.actions.CallbackSystemAction.setA ctionPerformer(CallbackSystemAction.java:118) at org.netbeans.modules.properties.PropertiesOpen$3.r un(PropertiesOpen.java:845) at org.openide.util.Task.run (Task.java:136) at org.openide.util.RequestProcessor$Task.run (RequestProcessor.java:330) at org.openide.util.RequestProcessor$Processor.run (RequestProcessor.java:680)
The exception and its stack trace is exactly the same as for bug #36400 ("IllegalStateException when opening properties file"). I am marking it as a duplicate of the bug. *** This issue has been marked as a duplicate of 36400 ***