When I am saving or performing a command, Sketchup will say, “not responding”. I think my file may be too big. It is 141 megs and I am still not finished. I booted up another drawing file that is only 20 megs and there is not problem. My drawing is a patio and I imported alot of objects from the 3D warehouse. I imported them directly into the drawing and made them groups. Most of the objects are people. Is my file too large and if so, how can I make it smaller?