Flip or swap a vector

Hi,

a very simple problem:

I want to flip a vector, that means reverse the sequence of its elements for example (1,2,3)  -->  (3,2,1). I tried several methods, none works really.

The problem is, the result vector seems to be ok, but if I use it in other expressions together with the vectorize operator MathCad says always this value has to be a vector.

I am using Prime 3.0. Thanks