Sorry. I should have provided more info. I have a large city model that I'm working on. I have layers, I'm purging unused, and I'm keeping texture sizes down. There is a lot of texture however, and the model is quite large. When SketchUp crashes, an error message comes up that says: "SketchUp has crashed unexpectedly. See report for more details." The reason the file is so large is probably geometry.
Thanks,
Avraham