I've belatedly located Corinna Vinschen's email message about the requirement for the stack address in fork. Would anyone be willing to elaborate on how the existing code is going about accomplishing the task at hand? If not, at least knowing that this is the goal of the exercise should make it easier to get a clue. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/