finite substrate using IE3D

Dears,

Please help me to solve the problem of UWB antenna design , error message appeared to me when i pressed on simulation button and this message told me " The magentic current modeling with finite dielectrics has not been implemented."
I attached file design and snap shoot for error message.

Thanks,

Dears,

I adjusted sigma value to be zero , i pressed simulation button and new error message has been apperared " Dynamic allocation failed in allocating in the matrix".

Thanks,