Hi, I am under-impression that for_each construct of range_ex for all container concepts. However when I tried with multi-index it gave conflicting errors. Attached below is the code and corresponding errors. code: typedef multi_index_container< std::pair, indexed_by< ordered_unique, value_type, &pair::first> >, ordered_unique, int, &pair::second> > > > mic; mic serialStore; for_each(serialStore, std::cout<