Hi Mo,
think I've found my issue its the BoundingBox-infos .
Yours shows an object output but the one within my nodeditor does not have this.
Hope this makes sense.
Cheers
Barry

Hi Barry
So sorry for the trouble.
Yes. It must be an old modification that I did on "BoundingBox-infos" node and forgot to register.
This is the fixed .nod file. Check if this one works.

Hi Peer
Yes, Michael's solution should be easier and faster. :)

I'm not sure if I understood the accuracy problem.
I think those "very close" points you mentioned are in a same height.
Curve below has 4 intersection points on highest location. all with the same "z" value. (values from nodeeditors's info panel)



Another test with moi's dimension tool:
I've made the blue line like this:
curve >> project >> use CPlane as target >> create a straight line on projected line
red line : nodeeditor

Hi MO,

Your results are pretty darn accurate. I'll give that approach another try.

- Peer

Thanks Mo,
working fine now.
Cheers
Barry