A set of points located between the two curves with one point located the end of each curve

And I Curve Through Interpolated Points to join the curve through the points and while specifying Start or End Tangent, I wish Rhino would ignore the point at the end for the purpose of the tangent.

It is hit or miss whether Rhino locks on to the point (meaningless result) or the end of the curve.

I start with two lines and three points. Two of the points are at the end of a line.

I copy and delete the two points at the end of the line.

I draw a curve through interpolated points using the start and end tangents on both.

If there is no point at the end of the line, I consistently get the curve tangent to the line.

If there is a point at the of the line, I more often than not get a curve that is not tangent to the line. It appears that the N/T opens lock on the to the point, rather than the line.

Is this the difference between InterpCrv with Knots=Uniform vs Knots=Chord?
I am assuming InterpCrv in Rhino for Mac has the same options as in Rhino for Windows

For curves that are not lines, you’ll either need to turn the points of that curve on or have construction geometry. You need to place the tangent point in the correct direction.
-wim

My observation is that sometimes tangent locks on to the end of the line (correct result) and sometimes locks on to the point (the tangent line can go anywhere).