I've tried with some examples like [ #() at: 3 ] fork. and some  
network server code. It seems that for these cases your code works  
like charm. I've not tested with GUI code related case. (My main work  
is related to network server and very simple client for it.)

Thanks. If anything wrong happens, I'll report it.


>
> You see that I propose to suspend the active
> controller process if (and only if) it is not the process
> to be debugged. Please try this very carefully
> (that means: after you have made backups of
> all your important things) and let me know
> wheather if facilitates your work.
>
> Gretings,
> Boris
>
>
>