Chi^2 calculations above some "size" or "complexity", using Maple 9.5 and Global Optimization Toolbox (GOT), may produce after some time of calculation error messages like:

"Execution stopped: stack limit reached.
The kernel has been shut down. Further computation cannot be performed."

Seeking workarounds, I have looked for information at ?kernelopts for kernelopts(stacklimit), but it was not very useful:

"Limits may be raised or lowered. Maple limits may not be raised above any system defined hard limits. "