Hi folks While reading out a serial interface with boost asio, I used the following timeout protection: const boost::function SerialInterface::ON_TIMEOUT(if_then(_1 != error::operation_aborted, throw_exception(bind(constructor< SerialInterfaceTimeoutException> ())))); // ... void SerialInterface::read(void *buf, size_t size) throw(SerialInterfaceTimeoutException) { charTimeout.expires_from_now(maxCharDelay); charTimeout.async_wait(ON_TIMEOUT); // ... If a timeout occurs, the exception is thrown as expected. However, it is not handed any further from read, but instead the program terminates with a message concerning the exception. Is there any method having a throw() constraint in this async_wait chain? Thanks for any hint and best regards Pascal _________________________________________________________________ Personalisiere dein Messenger, inklusive persönliche Smileys ;-) Überrasche deine Freunde - wir zeigen dir wie's geht. http://rubrik.ch.msn.com/reportagen/personalisieren.aspx