Hi All, I am making use of boost 1.32.0 (as given in the MPL book CD). I have written a small program using mpl::vector. I am getting the following error. What could be the problem? (begin-quote) lotus 241 $ CC -I$BOOST_ROOT -c hello.c "/backup/dev_area/anna/mplbookcd/boost_1_32_0/boost/mpl/if.hpp", line 63: Warning (Anachronism): Type names qualified by template parameters require "typename". "/backup/dev_area/anna/mplbookcd/boost_1_32_0/boost/mpl/if.hpp", line 72: Where: While specializing "boost::mpl::if_<boost::mpl::T1, boost::mpl::T2, boost::mpl::T3>". "/backup/dev_area/anna/mplbookcd/boost_1_32_0/boost/mpl/if.hpp", line 72: Where: Specialized in non-template code. "/backup/dev_area/anna/mplbookcd/boost_1_32_0/boost/mpl/aux_/preprocessed/no_ttp/plus.hpp", line 148: Warning (Anachronism): Type names qualified by template parameters require "typename". "/backup/dev_area/anna/mplbookcd/boost_1_32_0/boost/mpl/aux_/preprocessed/no_ttp/minus.hpp", line 148: Warning (Anachronism): Type names qualified by template parameters require "typename". "/backup/dev_area/anna/mplbookcd/boost_1_32_0/boost/mpl/vector/aux_/iterator.hpp", line 92: Error: Partial specialization parameter m_ is not used in the arguments. "hello.c", line 4: Error: mpl is not defined. "hello.c", line 4: Warning (Anachronism): Using vector as a template without a declaration. "hello.c", line 4: Error: vector is not defined. 3 Error(s) and 4 Warning(s) detected. lotus 242 $ cat hello.c #include "boost/mpl/vector.hpp" typedef mpl::vector<int, char*, double& > seq; lotus 243 $ CC -V CC: Sun C++ 5.5 2003/03/12 lotus 244 $ uname -a SunOS lotus 5.10 Generic_125100-09 sun4v sparc SUNW,Sun-Fire-T200 lotus 245 $ (end-quote) Rgds, anna