Please read careful my opening post.
I give here a link to a picture that shows the situation.
You can see a big cube and inside there are some lesser ones.
I started a beam and that hits the big cube surface. The hit has a point in the world and that lays on the beam (line).
I would like to know that adjacent point's coordinates, that lays also on the beam and is the next after the hit's point.
Edit: One more remark. If i use the IGNORE_YOU there is no more hit detection.