I am trying to open an igs file which i have never used before. Solidworks just freezes up. It is a scan of a cavitaion in a turbine. Roughly 5" x 6". I checked the add-in for scanto3d but i can't get anything to work. I would like to be able to open this and look at it, then run it through a CAM and machine it. The file size is 240Mb. Any suggestions?