Hi, The switch-case in class archive_exception lacks a 'break' after the 'stream error' case which leads to incorrect what() message. I also note that the error code "invalid_class_name" doesn't have a message equivalent. Furthermore I'm confused about this (which was the reason I found the other bug) : (VC7.1 + Dinkumware) int main() { try { // save { std::ofstream ofs("serializer_test.txt"); boost::archive::text_oarchive oa(ofs); oa << 'x'; // ofs.close(); // uncommenting this throws "stream_error" (altough currently with wrong what() message) oa << 'y'; } // load { std::ifstream ifs("serializer_test.txt", std::ios::binary); boost::archive::text_iarchive ia(ifs); char x, y; ia >> x; // ifs.close(); // uncommenting this _doesn't_ throw? ia >> y; assert(x == 'x' && y == 'y'); } } catch(std::exception const& e) { std::cout << e.what(); } return 0; } Shouldn't reading throw also? The archives check is/os.good() to throw. Or is this a bug in my std.lib (or my understanding of it? ;) // Fredrik Blomqvist