Hi there, sorry to bother the community with my phoenix problems today. Please consider the following code sample: #include <boost/spirit/include/phoenix_algorithm.hpp> #include <boost/spirit/include/phoenix_bind.hpp> #include <boost/spirit/include/phoenix_container.hpp> #include <boost/spirit/include/phoenix_core.hpp> #include <boost/spirit/include/phoenix_function.hpp> #include <boost/spirit/include/phoenix_fusion.hpp> #include <boost/spirit/include/phoenix_object.hpp> #include <boost/spirit/include/phoenix_operator.hpp> #include <boost/spirit/include/phoenix_scope.hpp> #include <boost/spirit/include/phoenix_statement.hpp> #include <boost/spirit/include/phoenix_stl.hpp> #include <algorithm> #include <iostream> #include <fstream> #include <vector> int _tmain(int argc, _TCHAR* argv[]) { using namespace std; using namespace boost::phoenix; using namespace boost::phoenix::arg_names; vector< int > ints; ofstream out( ".\\remove.txt" ); // works std::for_each( ints.begin(), ints.end(), cout << arg1 << " " ); // doesn't work - error C2297: '<<' : illegal, right operand has type 'const char *' std::for_each( ints.begin(), ints.end(), out << arg1 << " " ); return 0; } I couldn't find anything inside the documentation regarding file streams. Thanks, Christian