Unity Crashes when Building

Cannot build in Unity 5.1.1
When I build unity crashes and I have to re open the project.

If you know the issue please help

Cheers
George

I had a similar problem, Unity crashed whenever I built my project. I created a test scene in my project with just a cube in it, and that scene was still crashing the editor when I tried to build.

The solution for me was to remove assets form the Resources folder. I had a bunch of procedural generated assets stored in the Resources folder. Removing them fixed it.