Hi everybody...

sorry... but I'm stuck again with this tutorial...

I'm at the point where I should model the top of the canopy with the Birail Tool. Well, all I've got so far is the following error message:

// Error: dpBirailSrf1 (Dp Birail Srf Node): First profile does not intersect rail curves. //
// Warning: dpBirailSrf1 (Dp Birail Srf Node): Birail surface not created //
// Warning: nurbsTessellate2 (Nurbs Tessellate Node): invalid input NURBS surface. //
// Result: dpsBirailSurface1 dpBirailSrf1 //

How to solve it?

I'm attaching a picture of the current stage of the modeling. It might help you to understand the cause of the problem. In my opinion my curves resembles a lot those shown in McKinley's tutorial. I've been very accurate in tracing them with the CV Curve Tool... nonetheless, the Birail tool does not work!

Hope to get help from you out there...

Thank You!