edge with a complete circle

[197319731973]

Dear every body ,

I have a big problem between unigraphics and parasolid , when I have an edge with complete circle in a body , if I compute the point at the parameter 0.0 in parasolid I get a point and in unigraphics if i create the point at the parameter 0.0 , I don't get the same point , do you know how unigraphics compute its point for a edge with complete circle .
Thanks for your help
and happy day