Hi Francesco,
The support for shared_ptr was incomplete. Can you try this example with the current SVN trunk?
Matthias
Matthias, I tried this example using revision and I get this error: terminate called after throwing an instance of 'boost::exception_detail::clone_impl <boost::exception_detail::error_info_injector<boost::mpi::exception>>' what(): MPI_Unpack: MPI_ERR_TRUNCATE: message truncated [...] I tested this because I try to do something very similar but it also does not work. See my code example here: http://gist.github.com/613446 (see error message here http://gist.github.com/613479) Am I messing up here or is this a problem with Boost MPI possibly in how it interacts with Boost Serialization? Also I had a version of this code where shared_ptr was replaced by a regular pointer which also did not work [0]. Is it a bad idea in general to use a regular pointers when sending stuff through MPI using serialization? Best, Sebastian [0]: https://gist.github.com/613446/afba16ea4711f8674060ffcdbb41e85188d572c7