free prolog-stacks

[dietmar]

Hi,
I got a problem with my prolog-parser. 
I defined a new main()-method and started a prolog
query. After that, I do not need the prolog-engine
any more and would like to free the allocated stacks,
but I could not guess a method, how to do so.
I only know how to reduce the stack-sizes at compile-time,
but than I would get a stack-overflow.
Is there a way to free the stacks without exiting from
the main-method?

Thanks for your help.
 Dietmar Dreyer