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java.awt.HeadlessException: 	at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)	at java.awt.Window.(Window.java:317)	at java.awt.Frame.(Frame.java:419)	at java.awt.Frame.(Frame.java:384)	at javax.swing.JFrame.(JFrame.java:150)	at com.calypso.apps.util.MonitoringFrame.(MonitoringFrame.java:72)	at com.calypso.apps.util.XLWriteMonitoringFrame.(XLWriteMonitoringFrame.java:13)	at com.calypso.apps.util.XLWriteMonitoringFrame.main(XLWriteMonitoringFrame.java:51)