I’ve been having problems with Rhino 6 freezing when I try to save. It seems to happen when I am in Rendered modes like “Rendered” or “Arctic” and displaying Grasshopper meshes. It also freezes when I try to switch the view back to a non-rendered display mode like “Shaded”. The file is not overly large (14MB) so I don’t think it’s a file size problem
Which release of V6 are you using? The latest is SR 11 from a couple of days ago.