You need both Lock Profile Plane and Fix Profile selected to get proper results. Unfortunately, when I just tried it I got an error message. I am using VW 2017 and I notice that post was from 2016, so all I can think of is VW changed something in the Extrude Along Path code that introduced a bug. Hopefully the bug is fixed in newer versions of VW. If not, I figured out a work around that works consistently, at least with my set up anyway. The fix is to manually position your profile/rectangle at