Hello, I've several threads running. Each thread has its own state_machine. Sometime (not reproducible) I get following assertion: /opt/boost/include/boost-1_33_1/boost/statechart/state_machine.hpp:833: void boost::statechart::state_machine<MostDerived, InitialState, Allocator, ExceptionTranslator>::send_event(const boost::statechart::event_base&) [with MostDerived = iris::proto::svc::sm<ogx::net::ipv4::stream>, InitialState = iris::proto::svc::proto<ogx::net::ipv4::stream>, Allocator = std::allocator<void>, ExceptionTranslator = boost::statechart::null_exception_translator]: Assertion `get_pointer( pOutermostUnstableState_ ) == 0' failed. What does get_pointer( pOutermostUnstableState_ ) != 0' indicate? Regards, Oliver