If I build the boost demo_auto_ptr example from http://www.boost.org/libs/serialization/example/demo_auto_ptr.cpp it works fine. But if I change my code (see attach) it doesnt't compile. The main difference in my code from boost's sample is that I don't use save() and load() functions. If I add and call them it works fine. The reason my code doesn't compile is that I get BOOST_STATIC_ASSERT. Compiler (VC 7.1 and VC 8.0) points to the code: template inline void save(Archive & ar, T &t){ // if your program traps here, it indicates taht your doing one of the following: // a) serializing an object of a type marked "track_never" through a pointer. // b) saving an non-const object of a type not markd "track_never) // Either of these conditions may be an indicator of an error usage of the // serialization library and should be double checked. See documentation on // object tracking. BOOST_STATIC_ASSERT(check_tracking<T>::value); // <---------- compile error save(ar, const_cast(t)); } Why my code doesn't compile and what should I do to build it?