请问仿真时候出现这种是什么情况啊，边界条件设置的对称呀，也平行

你好我是河源人

Project2 (C:/Users/a1650/Documents/Ansoft/)
  HFSSDesign1 (DrivenModal)
    [error] Port 'FloquetPort1': The exterior boundary of the faces for a Floquet Port must consist of pairs of parallel and equal length segments, displaced from each other by an integer linear combination of the lattice vectors. (9:52:05 下午  8月 26, 2022)