Transfinite Volume does not accept a surface which has not been explicitly 'Transfinite(d)'
Transfinite Volume doesn't accept a surface which has not been explicitly 'Transfinite(d)' : for example it does not accept surface whose mesh was obtained using Periodic Surface with a master Surface 'transfinited' (and recombined). The same problem occurs if we try to transfinite a volume containing a new "top" surface num[0] obtained by extruding a 'transfinited' surface (or all other surfaces that are created during the extrusion)