Hi there. I have a recent CVS version of Boost installed, and am using g++ v3.2. I tried to compile the following program: -----------lambda_test.cpp------------ #include <iostream> #include <string> #include <list> #include <algorithm> #include <boost/lambda/lambda.hpp> using namespace std; using namespace boost::lambda; int main() { list<int> ell; for (int i=0; i<100; ++i) ell.push_back(4*i-1); for_each(ell.begin(), ell.end(), cout << _1 << endl); } -------------------------------------- I am met by: % g++ -I/usr/local/boost -c lambda_test.cpp lambda_test.cpp: In function `int main()': lambda_test.cpp:17: no match for `const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda:: bitwise_action<boost::lambda::leftshift_action>, boost::tuples::tuple<std::ostream&, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > > << <unknown type>' operator Any suggestions? I am aware that I can replace endl by '\n' and get a compilable program. I worry that this problem extends to other manipulators... Thanks, Ken