Hey, Boost serialization: how to register template derived class. The problem in general: I have the following classes: - Virtual based class: class TemplateBase { } - Derived class: template <class KUKU, int KUKUINT> class KukuBase : public TemplateBase{ } And I am trying to serialize the derived class KukuBase<KUKU, KUKUINT>through a pointer of the base type (polymorphism…). The problem is that I can not find a way to register the class KukuBase<KUKU, KUKUINT> and thus get unregistered_class exception. How to make it works? The cpp file: #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> // Serialization #include <boost/serialization/string.hpp> #include <boost/serialization/vector.hpp> #include <boost/serialization/access.hpp> #include <boost/serialization/base_object.hpp> #include <boost/serialization/serialization.hpp> #include <boost/serialization/export.hpp> #include <fstream> class TemplateBase { public: TemplateBase() : mI(0) {} virtual TemplateBase* Clone() = 0; int mI; private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & mI; } }; template <class KUKU, int KUKUINT> class KukuBase : public TemplateBase { public: KukuBase() : mZ(1) {} TemplateBase* Clone() { return new KukuBase<KUKU, KUKUINT>(*this); } private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & boost::serialization::base_object<TemplateBase>(*this); ar & mZ; } float mZ; }; class foo { public: foo() : mT(new KukuBase<int, 5>) {}; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & mT; } TemplateBase* mT; }; BOOST_CLASS_EXPORT(foo); //BOOST_CLASS_EXPORT((KukuBase)); BOOST_CLASS_EXPORT(TemplateBase); int main() { std::ofstream ofs("/tmp/kuku"); boost::archive::text_oarchive ar(ofs); const foo bar; ar << bar; } The program returns: terminate called after throwing an instance of 'boost::archive::archive_exception' what(): unregistered class Abort And the stuck shows: (gdb) bt #0 0x000000000049e409 in kill () #1 0x0000000000470582 in abort () at ../sysdeps/generic/abort.c:88 #2 0x0000000000461bf8 in __gnu_cxx::__verbose_terminate_handler () #3 0x000000000045e216 in __cxxabiv1::__terminate () #4 0x000000000045e243 in std::terminate () #5 0x000000000045e343 in __cxa_throw () #6 0x000000000040190c in boost::throw_exception<boost::archive::archive_exception> () #7 0x00000000004015e1 in boost::archive::detail::save_pointer_type<boost::archive::text_oarchive, TemplateBase*>::polymorphic<TemplateBase>::save () #8 0x000000000040152d in boost::archive::detail::save_pointer_type<boost::archive::text_oarchive, TemplateBase*>::save<TemplateBase> () #9 0x000000000040142e in boost::archive::detail::save_pointer_type<boost::archive::text_oarchive, TemplateBase*>::invoke () #10 0x00000000004013aa in boost::archive::save<boost::archive::text_oarchive, TemplateBase*> () #11 0x0000000000401344 in boost::archive::basic_text_oarchive<boost::archive::text_oarchive>::save_override<TemplateBase* const> () #12 0x00000000004012e8 in boost::archive::detail::interface_oarchive<boost::archive::text_oarchive>::operator<< <TemplateBase* const> () #13 0x0000000000401299 in boost::archive::detail::interface_oarchive<boost::archive::text_oarchive>::operator&<TemplateBase*> () #14 0x000000000040124c in foo::serialize<boost::archive::text_oarchive> () #15 0x0000000000401197 in boost::serialization::access::serialize<boost::archive::text_oarchive, foo> () #16 0x0000000000401107 in boost::serialization::serialize<boost::archive::text_oarchive, foo> () #17 0x0000000000400f83 in boost::serialization::serialize_adl<boost::archive::text_oarchive, foo> () #18 0x00000000004022c6 in boost::archive::detail::oserializer<boost::archive::text_oarchive, foo>::save_object_data () #19 0x0000000000405c59 in boost::archive::detail::basic_oarchive_impl::save_object () #20 0x0000000000400d43 in boost::archive::detail::save_non_pointer_type<boost::archive::text_oarchive, foo>::save_standard::invoke () #21 0x0000000000400c6f in boost::archive::detail::save_non_pointer_type<boost::archive::text_oarchive, foo>::invoke () #22 0x0000000000400aff in boost::archive::save<boost::archive::text_oarchive, foo> () #23 0x0000000000400a38 in boost::archive::basic_text_oarchive<boost::archive::text_oarchive>::save_override<foo const> () #24 0x000000000040090e in boost::archive::detail::interface_oarchive<boost::archive::text_oarchive>::operator<< <foo const> () #25 0x0000000000400423 in main () (gdb) Quit Thanks,-Ariella ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ