Oscar, I have been reading your post three times, and I have no idea, what you are trying to do. Can you please try to enlighten me? >I've extended quixote session publish to integrate generators. My understanding of a generator is "something that yields" Now, that is fine with something that runs sometime. But all my quixote-programs end immediatly after serving a request - what can not take more than 3 seconds; but normally is finished quite faster than 0.01 seconds. So what does happen with all the things stored on the stack????? Please forgive me for not grasping the idea --- but I'm willing to try!! Harald