My guess would be memory limitations at this point but I have one other suggestion. Go back into options and change the view generation mode to Approximate. Then open the original product (not the cgr) and create a drawing view. When in options you can adjust the "configure" option for Time or Level of detail. The Approximate option will drop some detail depending on the configure number you set. Like you did before, try this with a small product first with the configure setting on 1 then on 5 and see the difference. This may get you by for now...
Jim