GetNearestPointTf

[DunchaLin3]

The previous post was just a correction of your code. About the actual solution for your problem:
1- is your spline A a simple line?
2- are all splines in the same plane?

1 - Yes, spline A a simple line
2 - All splines in same plane. 
The main what i need is find cross of splines and how i read in documentation, its not possible with GetNearestPointTf. Or i am wrong with it?