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java.awt.HeadlessException: null at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:207)[na:1.7.0_111] at java.awt.Window.<init>(Window.java:535)[na:1.7.0_111] at java.awt.Frame.<init>(Frame.java:420)[na:1.7.0_111] at java.awt.Frame.<init>(Frame.java:385)[na:1.7.0_111] at javax.swing.SwingUtilities$SharedOwnerFrame.<init>(SwingUtilities.java:1756)[na:1.7.0_111] at javax.swing.SwingUtilities.getSharedOwnerFrame(SwingUtilities.java:1831)[na:1.7.0_111] at javax.swing.JOptionPane.getRootFrame(JOptionPane.java:1697)[na:1.7.0_111] at javax.swing.JOptionPane.showOptionDialog(JOptionPane.java:863)[na:1.7.0_111] at javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:667)[na:1.7.0_111] at javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:638)[na:1.7.0_111] at org.multibit.hd.core.error_reporting.ExceptionHandler$1.run(ExceptionHandler.java:112)[multibit-hd.jar:na] at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:312)[na:1.7.0_111] at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:745)[na:1.7.0_111] at java.awt.EventQueue.access$300(EventQueue.java:103)[na:1.7.0_111] at java.awt.EventQueue$3.run(EventQueue.java:706)[na:1.7.0_111] at java.awt.EventQueue$3.run(EventQueue.java:704)[na:1.7.0_111] at java.security.AccessController.doPrivileged(Native Method)[na:1.7.0_111] at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)[na:1.7.0_111] at java.awt.EventQueue.dispatchEvent(EventQueue.java:715)[na:1.7.0_111] at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)[na:1.7.0_111] at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)[na:1.7.0_111] at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)[na:1.7.0_111] at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)[na:1.7.0_111] at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)[na:1.7.0_111] at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)[na:1.7.0_111]