[root@opmgmrs24dcd bin]# ./ShutDownOpManager.sh

Exception in thread "main" java.awt.HeadlessException:

No X11 DISPLAY variable was set, but this program performed an operation which requires it.

        at java.awt.GraphicsEnvironment.checkHeadless(Unknown Source)

        at java.awt.Window.<init>(Unknown Source)

        at java.awt.Frame.<init>(Unknown Source)

        at java.awt.Frame.<init>(Unknown Source)

        at javax.swing.JFrame.<init>(Unknown Source)

        at com.adventnet.me.opmanager.tray.ShutDownUI.main(ShutDownUI.java:668)