This is likely caused by a bug in your program. Can you break your program down into smaller pieces, or disable portions of its functionality to see if the error goes away? Are you overflowing your stack (e.g., large arrays as auto variables in functions, or using lots of recursive function calls)? Maybe you're overflowing an array and overwriting some global variables?
If you use the debugger to single-step over lines of code in your main loop, you'll find out which function call causes the crash. Then you can single step over lines in that code.
You're getting the run-time error as part of the crash, and the result is that the debugger (hosted on the Rabbit) stops working so you can't debug your program.