例外のタブを開くと、 java.lang.NullPointerException at org.monazilla.v2c.V2CMain.<V2CMain.java:1860> at org.monazilla.v2c.V2CApp.start(V2CApp.java:1086) at org.monazilla.v2c.V2CApp.startApp(V2CApp.java:362) at V2C.main(V2C.java:3) at sun.reflect.NativeMethodAccessorlmpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorlmpl.invoke(NativeMethodAccessorlmpl.java:39) at sun.reflect.DelegatingMethodAccessorlmpl.invoke(DelegatingMethodAccessorlmpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at com.sun.javaws.Launcher.executeApplication(Launcher.java:1175) at com.sun.javaws.Launcher.executeMainClass(Launcher.java:1122) at com.sun.javaws.Launcher.continueLaunch(Launcher.java:965) at com.sun.javaws.Launcher.handleApplicationDesc(Launcher.java:518) at com.sun.javaws.Launcher.handleLaunchFile(Launcher.java:218) at com.sun.javaws.Launcher.run(Launcher.java:165) と表示されます。