Hello all, This is a corollary to my recent question on serialisation of shred_ptrs and polymorphic classes - I noted it in that thread but it may be lost in the debris. In an effort to get them to work, I have put in a BOOST_CLASS_EXPORT_GUID in my base and derived classes. However, this brings up a compilation error...

...

whole load of template faults then... (see below for full error list)

../boost_1_33_1/boost/archive/basic_xml_archive.hpp:66: error : incomplete type 'boost::STATIC_ASSERTION_FAILURE< false>' used in nested name specifier ../boost_1_33_1/boost/archive/basic_xml_archive.hpp:66: error : size of array has non-integral type '<type error>' Now looking at the code where the final error occurs, it says this is usually down to an unspecified NVP - i.e. a serialisation of a data item not in an nvp statements. However, all the classes involved do have this correctly set up. I have one question on it though.. Should I do this in my derived class to include the base class serialisation ar & base_object<A>(*this) Or should I do this ar & base_object<A>(make_nvp("base", *this) ) Both give the same compile error Or is there simply a problem with BOOST_CLASS_EXPORT_GUID that means that it is emitting something that needs nvp wrapping but this isn't being done? James Complete compile error dump for masochists iwmmxt_le-g++ -c -o TextPanel.o TextPanel.cpp -O0 -Iinclude -I../Renderer/include -I../GI/include -I../boost_1_33_1 -I../common/include -fPIC ../boost_1_33_1/boost/archive/basic_xml_oarchive.hpp: In member function `void boost::archive::basic_xml_oarchive<Archive>::save_override(T&, int) [with T = const LCPanel, Archive = boost::archive::xml_oarchive]': ../boost_1_33_1/boost/archive/detail/interface_oarchive.hpp:78: instantiated from `Archive& boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) [with T = const LCPanel, Archive = boost::archive::xml_oarchive]' ../boost_1_33_1/boost/archive/detail/interface_oarchive.hpp:86: instantiated from `Archive& boost::archive::detail::interface_oarchive<Archive>::operator&(T&) [with T = LCPanel, Archive = boost::archive::xml_oarchive]' include/TextPanel.hpp:115: instantiated from `void LCTextPanel::serialize(Archive&, unsigned int) [with Archive = boost::archive::xml_oarchive]' ../boost_1_33_1/boost/serialization/access.hpp:109: instantiated from `static void boost::serialization::access::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_oarchive, T = LCTextPanel]' ../boost_1_33_1/boost/serialization/serialization.hpp:81: instantiated from `void boost::serialization::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_oarchive, T = LCTextPanel]' ../boost_1_33_1/boost/serialization/serialization.hpp:140: instantiated from `void boost::serialization::serialize_adl(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_oarchive, T = LCTextPanel]' ../boost_1_33_1/boost/archive/detail/oserializer.hpp:233: instantiated from `boost::archive::detail::pointer_oserializer::pointer_oserializer() [with T = LCTextPanel, Archive = boost::archive::xml_oarchive]' ../boost_1_33_1/boost/archive/detail/oserializer.hpp:198: instantiated from `const boost::archive::detail::pointer_oserializer boost::archive::detail::pointer_oserializer::instance' ../boost_1_33_1/boost/archive/detail/oserializer.hpp:190: instantiated from `static const boost::archive::detail::pointer_oserializer& boost::archive::detail::pointer_oserializer::instantiate() [with T = LCTextPanel, Archive = boost::archive::xml_oarchive]' ../boost_1_33_1/boost/archive/detail/oserializer.hpp:515: instantiated from `const boost::archive::detail::basic_pointer_oserializer& boost::archive::detail::instantiate_pointer_oserializer(Archive*, T*) [with Archive = boost::archive::xml_oarchive, T = LCTextPanel]' ../boost_1_33_1/boost/serialization/export.hpp:83: instantiated from `static void boost::archive::detail::export_impl::archive::o::invoke() [with Archive = boost::archive::xml_oarchive, T = LCTextPanel]' ../boost_1_33_1/boost/serialization/export.hpp:105: instantiated from `static void boost::archive::detail::export_impl::archive::instantiate() [with Archive = boost::archive::xml_oarchive, T = LCTextPanel]' ../boost_1_33_1/boost/serialization/export.hpp:116: instantiated from `static void boost::archive::detail::export_impl::for_each_archive::instantiate() [with ASeq = boost::mpl::list2, T = LCTextPanel]' ../boost_1_33_1/boost/serialization/export.hpp:132: instantiated from `boost::archive::detail::export_generator::export_generator() [with T = LCTextPanel, ASeq = boost::mpl::list2]' ../boost_1_33_1/boost/serialization/export.hpp:139: instantiated from `const boost::archive::detail::export_generator > boost::archive::detail::export_generator >::instance' ../boost_1_33_1/boost/serialization/export.hpp:177: instantiated from `static const boost::archive::detail::export_generator* boost::archive::detail::export_instance::not_abstract::invoke() [with T = LCTextPanel, ASeq = boost::mpl::list2]' ../boost_1_33_1/boost/serialization/export.hpp:191: instantiated from `std::pair*, const boost::archive::detail::guid_initializer<T>*> boost::archive::detail::export_instance_invoke() [with T = LCTextPanel, ASeq = boost::mpl::list2]' ../boost_1_33_1/boost/serialization/export.hpp:211: instantiated from `static std::pair*, const boost::archive::detail::guid_initializer<T>*> boost::archive::detail::export_archives::non_empty_archive_list::invoke() [with T = LCTextPanel, ASeq = boost::mpl::list2]' ../boost_1_33_1/boost/serialization/export.hpp:225: instantiated from `std::pair*, const boost::archive::detail::guid_initializer<T>*> boost::archive::detail::export_archives_invoke(T&, ASeq&) [with T = LCTextPanel, ASeq = boost::mpl::list2]' include/TextPanel.hpp:124: instantiated from here ../boost_1_33_1/boost/archive/basic_xml_oarchive.hpp:86: error: incomplete type `boost::STATIC_ASSERTION_FAILURE< false>' used in nested name specifier ../boost_1_33_1/boost/archive/basic_xml_oarchive.hpp:86: error: size of array has non-integral type `<type error>' ../boost_1_33_1/boost/archive/basic_xml_iarchive.hpp: In member function `void boost::archive::basic_xml_iarchive<Archive>::load_override(T&, int) [with T = LCPanel, Archive = boost::archive::xml_iarchive]': ../boost_1_33_1/boost/archive/xml_iarchive.hpp:74: instantiated from `void boost::archive::xml_iarchive_impl<Archive>::load_override(T&, int) [with T = LCPanel, Archive = boost::archive::xml_iarchive]' ../boost_1_33_1/boost/archive/detail/interface_iarchive.hpp:76: instantiated from `Archive& boost::archive::detail::interface_iarchive<Archive>::operator>>(T&) [with T = LCPanel, Archive = boost::archive::xml_iarchive]' ../boost_1_33_1/boost/archive/detail/interface_iarchive.hpp:83: instantiated from `Archive& boost::archive::detail::interface_iarchive<Archive>::operator&(T&) [with T = LCPanel, Archive = boost::archive::xml_iarchive]' include/TextPanel.hpp:115: instantiated from `void LCTextPanel::serialize(Archive&, unsigned int) [with Archive = boost::archive::xml_iarchive]' ../boost_1_33_1/boost/serialization/access.hpp:109: instantiated from `static void boost::serialization::access::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_iarchive, T = LCTextPanel]' ../boost_1_33_1/boost/serialization/serialization.hpp:81: instantiated from `void boost::serialization::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_iarchive, T = LCTextPanel]' ../boost_1_33_1/boost/serialization/serialization.hpp:140: instantiated from `void boost::serialization::serialize_adl(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_iarchive, T = LCTextPanel]' ../boost_1_33_1/boost/archive/detail/iserializer.hpp:339: instantiated from `boost::archive::detail::pointer_iserializer::pointer_iserializer() [with T = LCTextPanel, Archive = boost::archive::xml_iarchive]' ../boost_1_33_1/boost/archive/detail/iserializer.hpp:211: instantiated from `const boost::archive::detail::pointer_iserializer boost::archive::detail::pointer_iserializer::instance' ../boost_1_33_1/boost/archive/detail/iserializer.hpp:203: instantiated from `static const boost::archive::detail::pointer_iserializer& boost::archive::detail::pointer_iserializer::instantiate() [with T = LCTextPanel, Archive = boost::archive::xml_iarchive]' ../boost_1_33_1/boost/archive/detail/iserializer.hpp:546: instantiated from `const boost::archive::detail::basic_pointer_iserializer& boost::archive::detail::instantiate_pointer_iserializer(Archive*, T*) [with Archive = boost::archive::xml_iarchive, T = LCTextPanel]' ../boost_1_33_1/boost/serialization/export.hpp:75: instantiated from `static void boost::archive::detail::export_impl::archive::i::invoke() [with Archive = boost::archive::xml_iarchive, T = LCTextPanel]' ../boost_1_33_1/boost/serialization/export.hpp:105: instantiated from `static void boost::archive::detail::export_impl::archive::instantiate() [with Archive = boost::archive::xml_iarchive, T = LCTextPanel]' ../boost_1_33_1/boost/serialization/export.hpp:116: instantiated from `static void boost::archive::detail::export_impl::for_each_archive::instantiate() [with ASeq = boost::mpl::list1, T = LCTextPanel]' ../boost_1_33_1/boost/serialization/export.hpp:122: instantiated from `static void boost::archive::detail::export_impl::for_each_archive::instantiate() [with ASeq = boost::mpl::list2, T = LCTextPanel]' ../boost_1_33_1/boost/serialization/export.hpp:132: instantiated from `boost::archive::detail::export_generator::export_generator() [with T = LCTextPanel, ASeq = boost::mpl::list2]' ../boost_1_33_1/boost/serialization/export.hpp:139: instantiated from `const boost::archive::detail::export_generator > boost::archive::detail::export_generator >::instance' ../boost_1_33_1/boost/serialization/export.hpp:177: instantiated from `static const boost::archive::detail::export_generator* boost::archive::detail::export_instance::not_abstract::invoke() [with T = LCTextPanel, ASeq = boost::mpl::list2]' ../boost_1_33_1/boost/serialization/export.hpp:191: instantiated from `std::pair*, const boost::archive::detail::guid_initializer<T>*> boost::archive::detail::export_instance_invoke() [with T = LCTextPanel, ASeq = boost::mpl::list2]' ../boost_1_33_1/boost/serialization/export.hpp:211: instantiated from `static std::pair*, const boost::archive::detail::guid_initializer<T>*> boost::archive::detail::export_archives::non_empty_archive_list::invoke() [with T = LCTextPanel, ASeq = boost::mpl::list2]' ../boost_1_33_1/boost/serialization/export.hpp:225: instantiated from `std::pair*, const boost::archive::detail::guid_initializer<T>*> boost::archive::detail::export_archives_invoke(T&, ASeq&) [with T = LCTextPanel, ASeq = boost::mpl::list2]' include/TextPanel.hpp:124: instantiated from here ../boost_1_33_1/boost/archive/basic_xml_iarchive.hpp:66: error: incomplete type `boost::STATIC_ASSERTION_FAILURE< false>' used in nested name specifier ../boost_1_33_1/boost/archive/basic_xml_iarchive.hpp:66: error: size of array has non-integral type `<type error>' This message (including 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