Hi lorem - that tool is for something different, it will create the curves where 2 solids intersect each other.

It does not cut or edit the solids in any way, it only creates new curves, like this - 2 solids that are pushing through each other:



Calculation of the intersection curves - these can now be used as a rail curve or for other construction purposes:




This command can also be used to find the points of intersection between a curve and a surface or solid, like this:





But the key thing is that this command creates new objects at the curves or points of intersection, it does not cut or modify objects - to modify objects use Trim or the Boolean commands instead.

- Michael