Exception occurred during event dispatching:
java.lang.Error: java.lang.reflect.InvocationTargetException
        at org.jdesktop.application.ApplicationAction.actionFailed(ApplicationAction.java:859)
        at org.jdesktop.application.ApplicationAction.noProxyActionPerformed(ApplicationAction.java:665)
        at org.jdesktop.application.ApplicationAction.actionPerformed(ApplicationAction.java:698)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2012)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2335)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:404)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:253)
...
.... etc, etc...