CST - Issues in a Cable Simulation

 

Hello everyone,

 

I am facing a probleme here, I am trying to modulate a cable for protection from lightning (conductor and insulating layer). The issue is that I get this erros while simulating.

 

I did add a current port, but I don't know if it's the right way to proced. 

 

Thank you in advance!

 

Omar

CST Studio Suite