Hi I am using boost 1.49. There is problem with serialization of shared_ptr with custom deleter, it doesnot preserve the deleter. After deserialization of shared_ptr with custom deleter, when using boost::get_deleter on the deserialized shared_ptr it returns null. Here is code example struct DetachTest { ~DetachTest() { int debug =0; } friend class boost::serialization::access; template<class Archive> inline void serialize(Archive & ar, const unsigned int file_version) { } }; { boost::shared_ptr<DetachTest> ss(new DetachTest,SmartDeleter<DetachTest>()); std::ofstream ofs("C:\\detach.xml"); boost::archive::xml_oarchive oa(ofs); oa & boost::serialization::make_nvp("detach",ss); } { DetachTest* test = 0; boost::shared_ptr<DetachTest> ss (test,SmartDeleter<DetachTest>()); //del is nonnul here SmartDeleter<DetachTest>* del = boost::get_deleter , DetachTest>(ss); std::ifstream ifs("C:\\detach.xml"); boost::archive::xml_iarchive ia(ifs); ia & boost::serialization::make_nvp("detach",ss); //de2 is null after deserialization SmartDeleter<DetachTest>* de2 = boost::get_deleter , DetachTest>(ss); } -- View this message in context: http://boost.2283326.n4.nabble.com/Serialization-serialization-of-shared-ptr... Sent from the Boost - Users mailing list archive at Nabble.com.