I’m trying to loft between two profiles that have an opening in the center to create a ring shape, although square in this case (see Loft Ring.jpg).  While creating it you can see that the two profiles are selected (see Loft Preview.jpg) but the “controller” is missing.  By controller I mean the line that connects the two profiles with the big green balls on them.  If I hit OK all I get is a box as if I had lofted between two squares.  If I add a guide curve connecting two of the inside corners, I get a truncated pyramid (see Loft Result 2.jpg), just the opposite of what I need.  Is it possible to loft between profiles that have holes in them?