Hello, I'm having a problem using boost::mpi::communicator::isend(). The problem is that it appears isend can't serialize via a pointer to the base of a polymorphic class. I'm using boost::serialization extensively to archive and I believe serializing via a pointer to a base class works when archiving. This is what I'm trying: class Event { public: virtual ~Event(); }; class Der1Event : Event { }; class Der2Event: Der1Event { }; Der2Event* d2 = new Der2Event; Der1Event* d1 = static_cast(d2) boost::mpi::communicator world; world.isend( 0, 0, d1 ); My program faults when calling isend(). I know my example is missing details such as serialization code but in principle should this work? BTW the following works. world.isend( 0, 0, d2 ) thanks Mike