Plane filling plugin?

adam2987

Hi, I do alot of site plans and spend a lot of my time filling in imported autocad drawings to get road surfaces created etc...

I have just tried intersecting the plan with a flat plane which I have created on/around the site plan but sketchup has gone quiet/crashed.

Does anybody know of a plugin which can help?

Thanks for any advice or suggestions. I may have missed something really obvious to remedy this!

Adam

remus