I tried putting the boost::multi_index::member<> in bare and it resulted in the error, regardless of if I hit 'build' or 'rebuild' solution.
Weird!! I'd be greateful if you could pursue this a little more. The macro looks like (the second branch is that matters): #if defined(BOOST_NO_POINTER_TO_MEMBER_TEMPLATE_PARAMETERS) #define BOOST_MULTI_INDEX_MEMBER(Class,Type,MemberName) \ ::boost::multi_index::member_offset<Class,Type,offsetof (Class,MemberName)> #else #define BOOST_MULTI_INDEX_MEMBER(Class,Type,MemberName) \ ::boost::multi_index::member<Class,Type,&Class::MemberName> #endif The only difference with the bare member call I can see is the full qualification, with a beginning :: included. Could you see if this makes any difference? Thanks! Joaquín M López Muñoz Telefónica, Investigación y Desarrollo