In which case the online help when you run u-v-b should either not offer vbox as an option (which it does) or it should barf early on with an "ENOTSUPPORTED" rather than chug away for a bit before realising that?
In which case the online help when you run u-v-b should either not offer vbox as an option (which it does) or it should barf early on with an "ENOTSUPPORTED" rather than chug away for a bit before realising that?