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java.awt.HeadlessException: 	at java.awt.GraphicsEnvironment.checkHeadless(Unknown Source)	at java.awt.Window.(Unknown Source)	at java.awt.Frame.(Unknown Source)	at com.sun.deploy.ui.DialogTemplate.deriveParent(DialogTemplate.java:1585)	at com.sun.deploy.ui.DialogTemplate.(DialogTemplate.java:105)	at com.sun.deploy.ui.UIFactory$3.execute(UIFactory.java:235)	at com.sun.javaws.ui.JavawsSysRun.delegate(JavawsSysRun.java:156)	at com.sun.deploy.util.DeploySysRun.execute(DeploySysRun.java:24)	at com.sun.deploy.util.DeploySysRun$1.run(DeploySysRun.java:46)	at java.security.AccessController.doPrivileged(Native Method)	at com.sun.deploy.util.DeploySysRun.executePrivileged(DeploySysRun.java:42)	at com.sun.deploy.ui.UIFactory.showErrorDialog(UIFactory.java:231)	at com.sun.javaws.ui.LaunchErrorDialog$2.execute(LaunchErrorDialog.java:237)	at com.sun.javaws.ui.JavawsSysRun.delegate(JavawsSysRun.java:156)	at com.sun.deploy.util.DeploySysRun.execute(DeploySysRun.java:24)	at com.sun.deploy.util.DeploySysRun.execute(DeploySysRun.java:33)	at com.sun.javaws.ui.LaunchErrorDialog.show(LaunchErrorDialog.java:253)	at com.sun.javaws.Launcher.prepareToLaunch(Launcher.java:214)	at com.sun.javaws.Launcher.launch(Launcher.java:101)	at com.sun.javaws.Main.launchApp(Main.java:311)	at com.sun.javaws.Main.continueInSecureThread(Main.java:215)	at com.sun.javaws.Main$1.run(Main.java:103)	at java.lang.Thread.run(Unknown Source)