Problem with Gambit 2.2.30
 

Hi,
I have a serious problem with gambit and I would like your help.
I have to make the mesh of a bioreactor having imported as file .igs by pro-eng. I cannot in any way make the face because it gives me a warm.
But my main problem is that even redrawing the vertices, once I deleted the edges,it also deletes the vertices: What can I do?
I also checked that all the vertices are real..

Please Help me...
thanks for your help