Hi all,

I'm trying to create a screw thread as shown in this thread:

http://moi3d.com/forum/messages.php?webtag=MOI&msg=767.1&highlight=yes

I create a helix then add a small triangle.




But when I sweep the triangle using the helix as the rail with a flat twist; I get this.





I tried the same thing in a new file and it worked ok. A bug maybe? Something I've done?

I've attached the offending .3dm file.