Thanks for the provided scene. I've done some tests with it, using RC 6.1.3, but I can't reproduce any troubles here with your scene (it previews & renders just fine). It looks like, you’re using RC 5.2.8, therefore let me point out, that’s most probably something already fixed in recent versions - generally, we recommend using the latest version released. Please feel free to check the Release Notes
, where you can find all new features, improvements, and bugs fixed since you've acquired it).
I hope that helps.