Call for help, about CST error

CST
When I carry out my simulation,The boring warning “Port 1 is inhomogeneously filled within the first 3 mesh cells. Cannot start solver.”，I'm sure that my configuration is OK,without any problem,because I have got my satisfactory result in the software HFSS。Can you give me a hand?Thank you!!

Possible reason 1: the mesh lines are not sufficient enough to distinguish the waveguide port and other metal object. Try to increase the mesh density.
Possible reason 2: the objects near waveguide port are overlapping for some reason, especially when you've imported the model from other CAD software.

專家正解啊

Thank you! I have already solved my problem.Some objects overlaped my port,and my transport feed_line is too short.Thank you ,especially hefang!