XML-Serialization_Problem with loading: Debug output

#0 0x4013383b in raise () from /lib/tls/libc.so.6 #1 0x40134fa2 in abort () from /lib/tls/libc.so.6 #2 0x400b6f57 in __cxa_call_unexpected () from /usr/lib/libstdc++.so.5 #3 0x400b6f94 in std::terminate () from /usr/lib/libstdc++.so.5 #4 0x400b7106 in __cxa_throw () from /usr/lib/libstdc++.so.5 #5 0x0805d1a3 in boost::archive::basic_xml_iarchive<boost::archive::xml_iarchive>::load_start () #6 0x0804d34b in boost::archive::basic_xml_iarchive<boost::archive::xml_iarchive>::load_override<CFixture> () #7 0x0804d328 in boost::archive::xml_iarchive_impl<boost::archive::xml_iarchive>::load_override<boost::serialization::nvp<CFixture>

() #8 0x0804cb08 in boost::archive::detail::interface_iarchive<boost::archive::xml_iarchive>::operator>><boost::serialization::nvp<CFixture> () #9 0x0804bf05 in load () #10 0x0804bac4 in main ()