@Franz i don't understand the purpose of that but you can use the rebuild
command (to get more point wich are on the curve) and then copy those point.

@Pilou i have used your sample and did it again like i explained and it works here.
(but i can't upload the picture to show you, because of an error i get)

@Brian i am no programmer and i don't know how useful it would be to extract
control points, like for example from a bool'ed cube and a sphere...

But i did a little test with .sat file export and this one liner... :-)

grep -e "point" infile.sat | cut -d" " -f4- | sed -e 's/^\(.*\) .*/\1/' > outfile.txt

This should give all control points in a .sat file, which IMHO should be read in
by the import points script.

Regards
Stefan