I am new to Landmark, and am having issues with the 'Extrude along Path' tool. I am trying to run an extruded box along an undulating ground line (to form a simple hedge following topography).   I have drawn an NURBS curve path which varies in Z height (it is sent to the surface of a site model which varies in height, and then converted from 3D poly to NURBS curve). I then created a 3D polygon rectangle (as a section of the hedge) at one corner of the NURBS curve path, and selected bot