CST conformal array design

Hi all,
I have a problem to design a conformal array in CST. The shape of the array is a circle arc over 120° and i have problem for the microwave port and the solver.
In fact, since the ports are rotated because the single elements don't point in the same direction, when i try to start the solver i receive the message:
Waveguide ports must be aligned with cartesian coordinate planes for the transient solver.
It will be great if someone can help me,
Thank you very much in advance,
tommy567

have you solved this problem? actually i'm having the same problem with a conformal array in a piramidal structure