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java.lang.InternalError: Can't connect to X11 window server using 'localhost:12.0' as the value of the DISPLAY variable. at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method) at sun.awt.X11GraphicsEnvironment.access$000(X11GraphicsEnvironment.java:53) at sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:142) at java.security.AccessController.doPrivileged(Native Method) at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:131) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:164) at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68) at java.awt.Window.init(Window.java:270) at java.awt.Window.<init>(Window.java:318) at java.awt.Frame.<init>(Frame.java:419) at oracle.ewt.popup.PopupFrame.<init>(Unknown Source) at oracle.ewt.lwAWT.BufferedFrame.<init>(Unknown Source) at oracle.sysman.oio.oioc.OiocOneClickInstaller.<init>(OiocOneClickInstaller.java:328) at oracle.sysman.oio.oioc.OiocOneClickInstaller.<clinit>(OiocOneClickInstaller.java:168)