I have been able to test with a string stream; the bug does not occur.

That is, this code produces the bug:

            std::ifstream ifs("container.mob");

boost::archive::text_iarchive ia(ifs);

ia & MyObject;

while the following does not:

            std::ifstream ifs("container.mob");

            std::ostringstream tmp;

tmp << ifs.rdbuf();

            std::istringstream is(tmp.str());

boost::archive::text_iarchive ia(is);

ia & MyObject;

a) try using a different stream buffer – strstream

So do you have any clue, Robert ?? Clearly the problem has to do with buffering somewhere….

Jean-Noël