(I'm not sure this is strictly related to Multi-Index in fact) Hi. If I #include <boost/multi_index_container.hpp> #include <boost/multi_index/random_access_index.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/hashed_index.hpp> #include <boost/multi_index/composite_key.hpp> #include <boost/multi_index/mem_fun.hpp> I get boost\detail\allocator_utilities.hpp(182) : warning C4100: 'p' : unreferenced formal parameter (we compile with a low threshold for warnings) If I try to suppress it with: #if defined(_WIN32) && defined( _MSC_VER ) #pragma warning(push) #pragma warning(disable : 4100) // unreferenced formal parameter #endif #include <boost/multi_index_container.hpp> #include <boost/multi_index/random_access_index.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/hashed_index.hpp> #include <boost/multi_index/composite_key.hpp> #include <boost/multi_index/mem_fun.hpp> #if defined(_WIN32) && defined( _MSC_VER ) #pragma warning(pop) #endif I get even more warnings (way more). I suspect that I'm getting in the way of a built-in mechanism in Boost to suppress warnings with my own #pragma warning push/pop. So my question is how I can suppress this one little warning (well, because of the instantiation trail of the B.MI, it's a 65 lines "little" warning...) without disabling Boost's own warning suppression? Thanks, --DD