Hello, I've attempted to compile a portion of the example source code for the Asio streambuf class. The code attempts to convert a streambuf to a const_buffers_type, to be used in receiving data from a UDP socket. The example can be found at " http://www.boost.org/doc/libs/1_40_0/doc/html/boost_asio/reference/streambuf...". The code in question is as follows: boost::asio::streambuf b; // reserve 512 bytes in output sequence boost::asio::streambuf::const_buffers_type bufs = b.prepare(512); For simplicity, I tried compiling only these two lines but I receive this compilation error: error C2440: 'initializing' : cannot convert from 'boost::asio::basic_streambuf<>::mutable_buffers_type' to 'boost::asio::const_buffers_1' Am I missing something obvious? It's my understanding that mutable buffers can always be converted to constant buffers. Why is the second line problematic? -- Dylan