3ds Max :: Force Closes Won't Render?

I had to download a file from school and then animate the object we were given. I saved the file to my folders and did the animation and saved it again. When I go to render, I get "unexpected error" and the program force closes. The error report says it is "Unhandled Exception". I just did another assignment last week, and it worked fine. I've changed nothing in the program. The only real difference this time is the presence of a light source and a camera, both of which I've used in the past with no problem.

It has been a couple months since I've worked in the program, and I'm hoping it is an easy fix, just something I've forgotten to change.