Hi Marco,

re:
> If, for example, the solution you thought (factory.calculate() that should return a script exception
> if the escape key.) will degrade the performance of the pipe command, please DON'T apply this
> new solution.

I don't expect it to have any significant performance impact but it could be good to repeat the test after the next beta to see for sure.

This one is easier to set up than figuring out how to force the crash dialog to get triggered, so I'll try this method first to see if it solves this problem.

- Michael