Tween between two curves not working

In Rhino 5 it was easy to draw a curve between 2 inputcurves.
The commands “Mean Curve” or “Average 2 Curves” gave perfect results.
In Rhino 6 this commands are no longer supported.
Now there is only the command “TweenCurves” available, wich gives strange results or often fails completely.

TweenCurves-Problem.3dm (109.4 KB)

Hello - match up the curve seams using CrvSeam before tweening. This should be part of the TweenCurves interface, I would say, as it is in Loft.


Thank You Pascal,

this solved my problem.
And - Yes, CrvSeam should be integrated into TweenCurves command.