Hello, the documentation (http://www.boost.org/doc/html/condition.html) of class condition contains a mistake: instead of template bool timed_wait http://www.boost.org/doc/html/condition.html (ScopedLock&, Pred); it should be template bool timed_wait http://www.boost.org/doc/html/condition.html (ScopedLock&, const boost::xtime http://www.boost.org/doc/html/xtime.html & , Pred); so long, Oliver