Hello all,

Having a bear of time trying to fix this surface. I've created a number of iterations of this model and this is the first time this problem has surfaced, no pun intended.

The below image illustrates my problem. The blue line represents the boundary of the surface and red represents the problem area. As you can see, the tangency flips in that area. How can I fix that? Thank for your help.

Click image for larger version. 

Name:	surface_issue_060619.jpg 
Views:	7 
Size:	9.2 KB 
ID:	7018