Port 1 does not have a solved inside material on either side

[andidmg]

hello everybody!
i am beginner in the use of HFSS. I design pyramidal horn antenna, validate is ok.but error after change material to aluminium.

[error] Port refinement, process hf3d error: Port 1 does not have a solved inside material on either side..
[error] Simulation completed with execution error on server: Local Machine.

what's wrong with the project? please somebody help me!!

 

[PlanarMetamaterials]

Sounds like you changed the wrong material to aluminium. Make sure the dielectric inside the waveguide feed wasn't changed.

 

[andidmg]

thanks PlanarMaterial, how make the dieletric inside the waveguide feed isn't change? please tell me step by step.help me!

 

[PlanarMetamaterials]

1) Select the object.
2) Observe the assigned material.
3) If the material is aluminium, change it to a dielectric.