FEKO Error 3849

I'm using FEKO full edition to investigate heating induced in a metallic catheter inside a patient being imaged by an MR scanner. I'm trying to model a coaxial cable partially embedded in a finite chunk of dielectric (simulating human tissue). After meshing I consistently get "ERROR 3849: Wrong specification of the medium for a metallic triangle. It worked fine with just my coax model but when I put in the dielectric it won't work.

Does anybody know what might be causing this or how to fix it?

Thanks, G

Dear sir,
I'm Thirumal Murugan doing my M.E., in Anna-university chennai . Sir i am doing project in feko software for constructing frequency selective surface. I am getting same "ERROR 3849: Wrong specification of the medium for a metallic triangle. Please help me to solve that error.

---------- Post added at 13:57 ---------- Previous post was at 13:55 ----------

Dear sir,
I'm Thirumal Murugan doing my M.E., in Anna-university chennai . Sir i am doing project in feko software for constructing frequency selective surface. I am getting same "ERROR 3849: Wrong specification of the medium for a metallic triangle, while using dielectric as soon as the mesh is over. Please help me to solve that problem.

You can increase the mesh resolution to solve this. This error happen when the dielectric and metal region overlaps.

The Help Centre on their website has a list of Warnings and Errors by number. Maybe see if you can get a fix for the error there.