Still doesn't work, now I get "Empty pointer in function" message.
It is not absolutely essential for me to get this done, but I made a script for Bezier Splines with lots af vector calculations. At this point I have all vectors
splitted off in their components which looks pretty messy, and I would like to work directly with vectors.
Perhaps you can copy the code and test it if you like.

P.S. Ich schreibe mal auf englisch weiter damit jeder mitlesen kann.