Test environment error

I tried creating a mob with a custom model made in Techne, and it compiles just fine. However, whenever I try to start the test environment, I get an error.

http://pastebin.com/nz6uCnEY

I tried making a mob without a custom model and it worked fine, so I don't know what the problem is. Help?

Here's the model, in case anyone wanted it: https://www.dropbox.com/s/voktpy6th1ylut6/angel.java?dl=0