Hello, I have a problem with serializing smart_ptrs. I have tried both the boost::scoped_ptr and the boost::shared_ptr but I get always the same error: Boost1-33\include\boost-1_33\boost\archive\detail\oserializer.hpp(566): error C2027: Use of undefined type "boost::STATIC_ASSERTION_FAILURE<x>" with [ x=false ] My example program: #include <boost/archive/tmpdir.hpp> #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> #include <boost/serialization/shared_ptr.hpp> struct Foo { int i; Foo( int j ) : i( j ) { } template< class T > void serialize( T& ar, const unsigned int ver ) { ar & i; } }; struct Test { boost::shared_ptr< Foo > t1; boost::shared_ptr< Foo > t2; Test() : t1( new Foo( 3 ) ), t2( t1 ) { } template< class Ar > void save( Ar& ar, const unsigned int ver ) { ar << t1; ar << t2; } template< class Ar > void load( Ar& ar, const unsigned int ver ) { ar >> t1; ar >> t2; } BOOST_SERIALIZATION_SPLIT_MEMBER(); }; int main( int argc, char* argv[] ) { Test t; std::ofstream ofs( "test.txt" ); boost::archive::text_oarchive out( ofs ); out << t; } I hope someone can help me (google and the documentation couldn't :() Sascha Friedmann