Loft keeps making groups instead of single NURBS

[techdef]

Trying to make a skin from other's lines. 15 of the 16 parts = 1 NURBS surface. Add in the 16th one and it makes a group of 6 NURBS that won't join/combine for love or money. Any hot tips?

[Benson Shaw]

Can you post the NURBS? Or screen shots?  Some combos never resolve to a single surface. 
 

But, some easy things to check:

• all curves same direction.
• loft order. Try reverse. 
• rubber band clicks to corresponding point on each curve. Try lofting from other ends. 
• similar vertex count on all curves. if acceptable, sometimes a trace of the problem curve can replace the orig for the loft.
• is the Surface fro Curves command any help here?

Good luck!

-B

[Claes Lundstrom]

It's not 16 curves as such. It does indeed work If you make one simple curve and duplicate it using Duplicate Array. So the shape is most likely the key here. I think the underlying 3D engine simply thinks your shape is too complicated to work, for example overlapping itself or something like that.