Hello Mr. Artemiev, Thank you very much for your solution. It worked fine. I am really grateful to you. If you don't mind I would like to ask you another question, that is - whether it is possible to define Line Loops using Spline/Bspline curves which makes a surface with more than 4 edges. I am willing to make a 3D grid around a NURBS surface (in .igs format) which is made up of several surfaces defined by BSpline curves. I am trying to make those surfaces Transfinite and after making those transfinite I am hoping to extrude those surfaces so that it makes a 3d grid. But I am finding it difficult to define those NURBS surface components into Transfinite surfaces (I am trying to make structured grid). I am sorry that I had asked a lot. It would really be a great help to me if you give me a clue on this matter.
Thanking you again, with regards, Amin
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