Week 5-Chassis and Engine

https://drive.google.com/open?id=1U7XaRcqtE6Rx1pB_jaNI3_9C4SSnWy9a

1. Additional Features learned:- Thin Extrude, Dome and Projected Curve and sweep

My SolidWorks crashes every time I sweep one of my exhaust pipes along the projected curve. I couldn\'t fix it, Please help.