That doesn't tell me the actual error (first part of the stack trace is missing) - probably something like "Out of index Exception". Can you please upgrade to the latest Core GameKit (so I can get line numbers that are the same as my version) and get that full stack trace to me?
Or you can send me a small example project that reproduces the error.
By the way, which function are you calling on what script? Let's see the code you wrote please so I can know more.