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java.awt.HeadlessException: 	at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)	at java.awt.Window.(Window.java:431)	at java.awt.Frame.(Frame.java:403)	at java.awt.Frame.(Frame.java:368)	at javax.swing.SwingUtilities$SharedOwnerFrame.(SwingUtilities.java:1731)	at javax.swing.SwingUtilities.getSharedOwnerFrame(SwingUtilities.java:1808)	at javax.swing.JDialog.(JDialog.java:259)	at javax.swing.JDialog.(JDialog.java:220)	at jsystem.runner.WaitDialog.(WaitDialog.java:46)	at jsystem.runner.WaitDialog.launchWaitDialog(WaitDialog.java:116)	at jsystem.runner.remote.RemoteExecutorImpl.run(RemoteExecutorImpl.java:164)	at jsystem.runner.remote.ScenarioExecutor.execute(ScenarioExecutor.java:117)	at jsystem.runner.agent.server.RunnerEngineImpl.run(RunnerEngineImpl.java:235)	at jsystem.runner.agent.server.RunnerAgent.run(RunnerAgent.java:293)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:93)	at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:27)	at com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:208)	at com.sun.jmx.mbeanserver.PerInterface.invoke(PerInterface.java:120)	at com.sun.jmx.mbeanserver.MBeanSupport.invoke(MBeanSupport.java:262)	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:836)	at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:761)	at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1426)	at javax.management.remote.rmi.RMIConnectionImpl.access$200(RMIConnectionImpl.java:72)	at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1264)	at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1359)	at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:788)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:305)	at sun.rmi.transport.Transport$1.run(Transport.java:159)	at java.security.AccessController.doPrivileged(Native Method)	at sun.rmi.transport.Transport.serviceCall(Transport.java:155)	at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)	at java.lang.Thread.run(Thread.java:619)