creating a solid body in Design Modeller

Dan

Hello,

Can anybody let me know the procedure to create a solid body (active) in Design Modeller from the component surfaces I have imported in iges format. I know that if the surfaces are matching, DM automatically creates a body. Howerver, in my current case they aren't and I need a solid body to perform a 'cut material' option onto an external domain.

Thanks in advance.