In files boost/archive/detail/iserializer.hpp and boost/archive/detail/oserializer.hpp use the instruction using namespace boost::serialization; As result in my code including <boost/archive/..._Xarchive.hpp> arised many next errors: ... zmr\fill_region.cpp(53) : error C2872: 'detail' : ambiguous symbol could be 'zmr::detail' or 'boost::serialization::detail' ... I think it is not good idea to use "using namespace ...;" in header files. Regards, Alexey.