Hi, I cannot resolve why boost::mem_fn does not appear to be able to resolve to a pointer (or a reference) from a smart pointer to a derived object (My understanding is that get_pointer in boost::shared_ptr is specifically available so that boost::mem_fn can work) Here is the example of code and line with error (Visual Studion 2008 32 bit) Thank you in advance for any help ---------------------------------------------- #include <iostream> #include #include #include #include #include #include <vector> using namespace boost; using namespace std; struct A: public enable_shared_from_this<A> { static void myfunc(const A* in) { } }; struct B: public A, public enable_shared_from_this<B> { typedef shared_ptr<B> tBptr; }; int main (void) { vector v; B::tBptr p(new B()); v.push_back(p); p.reset(new B()); v.push_back(p); //error cannot deduce argument for_each (v.begin(),v.end(), boost::mem_fn(&A::myfunc)); return 0; } -- V S P toreason@fastmail.fm -- http://www.fastmail.fm - A fast, anti-spam email service.