Hi, I'm new to this list. I tried to search something related to my problem but I found nothing (or at least, nothing I guess it's related to my problem) and, sincerly, I don't really know what to search for. I excuse if I made an already solved request. Anyway I have this problem: I'm trying to compile the demo_xml.cpp from the Serialization tutorial. I compiled the libraries with bjam, I use gcc 3.4.5 on MinGW 5.1.6 (windows 7). I use Eclipse 3.5 as IDE. I compiled and runned perfectly the text_archive version of the tutorial but if I include xml_iarchive.hpp or xml_oarchive.hpp I get the following error: ===========================================Start========================================= **** Build of configuration Debug for project TestVariBoost **** **** Internal Builder is used for build **** g++ -IC:\Users\blueangel\workspace\TestVariBoost\include -IC:\Program Files\boost/include -O0 -g3 -Wall -c -fmessage-length=0 -osrc\demo_xml.o ..\src\demo_xml.cpp C:/Program Files/boost/include/boost/archive/basic_xml_oarchive.hpp: In member function `void boost::archive::basic_xml_oarchive<Archive>::save_override(T&, int) [with T = const std::list<std::pair<bus_schedule::trip_info, bus_route*>, std::allocator<std::pair<bus_schedule::trip_info, bus_route*> > >, Archive = boost::archive::xml_oarchive]': C:/Program Files/boost/include/boost/archive/detail/interface_oarchive.hpp:63: instantiated from `Archive& boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) [with T = const std::list<std::pair<bus_schedule::trip_info, bus_route*>, std::allocator<std::pair<bus_schedule::trip_info, bus_route*> > >, Archive = boost::archive::xml_oarchive]' C:/Program Files/boost/include/boost/archive/detail/interface_oarchive.hpp:71: instantiated from `Archive& boost::archive::detail::interface_oarchive<Archive>::operator&(T&) [with T = std::list<std::pair<bus_schedule::trip_info, bus_route*>, std::allocator<std::pair<bus_schedule::trip_info, bus_route*> > >, Archive = boost::archive::xml_oarchive]' ..\src\demo_gps.hpp:271: instantiated from `void bus_schedule::serialize(Archive&, unsigned int) [with Archive = boost::archive::xml_oarchive]' C:/Program Files/boost/include/boost/serialization/access.hpp:118: instantiated from `static void boost::serialization::access::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_oarchive, T = bus_schedule]' C:/Program Files/boost/include/boost/serialization/serialization.hpp:74: instantiated from `void boost::serialization::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_oarchive, T = bus_schedule]' C:/Program Files/boost/include/boost/serialization/serialization.hpp:133: instantiated from `void boost::serialization::serialize_adl(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_oarchive, T = bus_schedule]' C:/Program Files/boost/include/boost/archive/detail/oserializer.hpp:148: instantiated from `void boost::archive::detail::oserializer<Archive, T>::save_object_data(boost::archive::detail::basic_oarchive&, const void*) const [with Archive = boost::archive::xml_oarchive, T = bus_schedule]' ..\src\demo_xml.cpp:277: instantiated from here C:/Program Files/boost/include/boost/archive/basic_xml_oarchive.hpp:92: error: no matching function for call to `assertion_failed(mpl_::failed************boost::serialization::is_wrapper<const std::list<std::pair<bus_schedule::trip_info, bus_route*>, std::allocator<std::pair<bus_schedule::trip_info, bus_route*> > >

::************)' C:/Program Files/boost/include/boost/archive/basic_xml_oarchive.hpp:92: error: enumerator value for `mpl_assertion_in_line_92' not integer constant Build error occurred, build is stopped Time consumed: 1263 ms. ============================================End=========================================

Really I don't understand which assertion I fail at compile time. At line 92 of basic_xml_oarchive.hpp a comment say that most probably the variable to be serialized the to be around a nvp wrapper but the demo do that (this way: "oa << BOOST_SERIALIZATION_NVP(s);"). What else can it be? Thank you for your time.