Hi, I'm trying to convert an hyperbolic mapping to a nurbsMapping. First, I'm generating an airfoil by using the spline mapping, then I'm generating an hyperbolic mapping, and in order to use this mapping in parallel, I have to convert it to a nurbsMapping (according to a previous discussion). And here is where I'm having problems, I have been playing around with a lot of options but basically I haven't been able to fix the resulting mapping. The resulting mapping is extremely twisted close to the trailing edge (negative volumes and skew cells), any suggestion how can I fix this problem or how to generate an airfoil ready to use in parallel?? King regards, Joel