CST error calculation unstable.. how to give wave ports to the rf mems design?

[jnadeem]

heloo
I m working on rf mems switches and when ever i try to simulate my design i get an error as "The calculation seems to be unstable! Consider reducing the value for the stability factor in the solver specials options". i dnt know whether its a problem in my design or i m giving wrong waveguide port to the design? kindly help if any one know about it