port refinement process hf3d : post does not have a solved inside material eitherside

port refinement process hf3d : post does not have a solved inside material either side...

i design the 4 port coupler using substrate integrated technology method ....I have received error is mention above the line.. i kindly request help with me

Select your objects one by one and check the properties pane. There should be a tick box 'Solve Inside' which should be ticked in the regions where you want to solve.

(this is normally left checked, unless your object is PEC or other high conductivity material)

U may also encounter this error when the metal traces are not exactly touching the port. Ensure that the size of the rectangle u define to assign an excitation should be sufficient for touching the metal traces.