Hi all, the following code double abc=lambda(_a=*ref(it)++)[_a*2.0]()(); // here 'it' is an //iterator produces the error C2440: 'initializing' : cannot convert from 'boost::phoenix::detail::error_expecting_arguments' to 'double' which should not be. The two lines of code let(_a=*ref(it)++)[_a*2.0](); //or lambda(_a=*ref(it)++)[_a*2.0*arg1]()( val); compile fine. Perhaps someone has an answer to this error? ( I use boost trunk version and msvc 2008) To reproduce the errors just compile the code below. Best regards Kim Tang # include <algorithm> # include <vector> # include using namespace boost::phoenix; using namespace boost::phoenix::arg_names; using namespace boost::phoenix::local_names; int main() { std::vector<double> u(11,1.0); std::vector<double> w(11,2.0); std::vector<double>::const_iterator it=w.begin(); //boost::phoenix::generate(ref(u) // ,lambda(_a=*ref(it)++)[_a*2.0 ] //)(); double abc=lambda(_a=*ref(it)++)[_a*2.0]()(); return 0; }