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java.lang.NullPointerException at oracle.forms.handler.FormWindow.handleWindowActivated(Unknown Source) at oracle.forms.handler.FormWindow.propertyChange(Unknown Source) at java.beans.PropertyChangeSupport.firePropertyChange(Unknown Source) at oracle.ewt.lwAWT.lwWindow.LWWindow.fireBooleanPropertyChanged(Unknown Source) at oracle.ewt.lwAWT.lwWindow.LWWindow.setActive(Unknown Source) at oracle.ewt.lwAWT.lwWindow.laf.BaseWindowManager.transferActivationForward(Unknown Source) at oracle.ewt.lwAWT.lwWindow.laf.BaseWindowManager.windowRemoved(Unknown Source) at oracle.ewt.lwAWT.lwWindow.DesktopContainer.processDesktopEvent(Unknown Source) at oracle.ewt.lwAWT.lwWindow.DesktopContainer.processEventImpl(Unknown Source) at oracle.ewt.lwAWT.LWComponent.redispatchEvent(Unknown Source) at oracle.ewt.lwAWT.LWComponent.processEvent(Unknown Source) at oracle.ewt.lwAWT.lwWindow.DesktopContainer.removeWindow(Unknown Source) at oracle.ewt.lwAWT.lwWindow.LWWindow.close(Unknown Source) at oracle.ewt.lwAWT.lwWindow.LWWindow.dispose(Unknown Source) at oracle.forms.handler.DialogThread.doAlert(Unknown Source) at oracle.forms.handler.DialogThread.run(Unknown Source) at java.lang.Thread.run(Unknown Source)