Hi, Could anyone help why the AIX (5.3) xlC complains on the include file 'static_move_ptr.hpp' and how to solve the problem if possible ? I tried on Linux g++ without problem. Thanks, Gary 8:52pm > xlC -I $HOME/BOOST/boost_1_36_0 example.cpp -o example "/home_dir/Ggfu/BOOST/boost_1_36_0/boost/ptr_container/detail/static_move_ptr.hpp", line 182.22: 1540-2611 (S) The name "typename move_ptrs::enable_if_convertible<TT,T,boost::ptr_container_detail::static_move_ptr &>::type::type" can only be used to declare a constructor. #include <boost/ptr_container/detail/static_move_ptr.hpp> #include <iostream> #include <string> using namespace std; int main() { //print out the text string, "Hello, World!" cout << "Hello, World!" << endl; return 0; }