api_check_entity

Hi,

I am working with IE3D an HFSS. I do design in IE3D and export it to HFSS. My circuit is 3D one and I transfert it to ".sat" in HFSS. But when I load it in HFSS there is an error message, Acis error: "api_check_entity failed for part: alim", when I define it as a model.
What this message mean?
How can I solve it?
Thank you for your help.

PAF