To get quiet compilations (MSVC 8.0 release 140050727, level 4, no MS extensions), I have had to disable persistent warnings from boost\test\detail\test_tools.hpp by adding to supress_warning.hpp # pragma warning(disable: 4127) // conditional expression is constant. Entirely correct and expected. # pragma warning(disable: 4180) // qualifier applied to function type has no meaning; ignored at: const_string message() const { return !m_message ? const_string() : const_string( m_message->str() ); } ^^ const not useful? but not wrong. # pragma warning(disable: 4224) // nonstandard extension used : formal parameter 'tool_level' was previously defined as a type i:\boost_1_33_0\boost/test/test_tools.hpp(385) : warning C4224: nonstandard extension used : formal parameter 'tool_level' was previously defined as a type i:\boost_1_33_0\boost/test/test_tools.hpp(427) : warning C4224: nonstandard extension used : formal parameter 'tool_level' was previously defined as a type i:\boost_1_33_0\boost/test/test_tools.hpp(427) : warning C4224: nonstandard extension used : formal parameter 'tool_level' was previously defined as a type i:\boost_1_33_0\boost/test/test_tools.hpp(427) : warning C4224: nonstandard extension used : formal parameter 'tool_level' was previously defined as a type i:\boost_1_33_0\boost/test/test_tools.hpp(427) : warning C4224: nonstandard extension used : formal parameter 'tool_level' was previously defined as a type i:\boost_1_33_0\boost/test/test_tools.hpp(427) : warning C4224: nonstandard extension used : formal parameter 'tool_level' was previously defined as a type Is it complaining about re-using the name tool_level? void check_impl( predicate_result const& pr, wrap_stringstream& check_descr, const_string file_name, std::size_t line_num, tool_level tool_level, check_type ct, <<<<<<<<<<<<<< std::size_t num_args, ... ); Of these, only the latter might be worth worrying about? Still works fine, but if you are tidying up sometime... Paul -- Paul A Bristow Prizet Farmhouse, Kendal, Cumbria UK LA8 8AB Phone and SMS text +44 1539 561830, Mobile and SMS text +44 7714 330204 mailto: pbristow@hetp.u-net.com www.hetp.u-net.com