please explain how to solve error in hfss

Hi

i am facing the error shown in the below image

Attachment 132436

this is my hfss file ...please help me how to solve this problem, i have searched on RG https://www.researchgate.net/post/Im..._overcome_this, on that page some people mentioned solutions but i am unable to excute them. please solve this problem this my hfss file

This means that you have assigned two different boundaries which overlap. It actually is not an error, just a warning, and your file will still simulate.