@Quadraxas: Maybee i am understand something wrong with the limit of 64 VECTOR Pointers.
In the Manual (--> Vector calciulation, --> vector) they say:

The vector pointers have a limited lifetime because there are only 64 different vectors available for this function, that are used cyclic.So use this only for passing temporary vectors to functions, but not for permanent vector pointers.

Can you explain me this thing? Thanks.