I'm trying to use boost::ptr_map<> and cannot get calls insert to compile. I'm on Mac OS X using gcc 3.3 with Xcode. Even the most basic code fails to compile: boost::ptr_map< in, int* > my_map; int * val = new int( 22 ); my_map.insert( 1, val ); This fails with: error: no matching function for call to `boost::ptr_map<int, int*, std::less<int>, boost::heap_clone_allocator, std::allocator<std::pair<const int, void*> > >::insert(int, int*&)' error: candidates are: std::pair<typename boost::ptr_container_detail::ptr_map_adapter_base<T, VoidPtrMap, CloneAllocator>::iterator, bool> boost::ptr_map_adapter<T, VoidPtrMap, CloneAllocator>::insert(typename boos t::ptr_container_detail::ptr_map_adapter_base<T, VoidPtrMap, CloneAllocator>::key_type&, typename boost::ptr_container_detail::ptr_map_adapter_base<T, VoidPtrMap, CloneAllocator>::value_type) [with T = int*, VoidPtrMap = std::map<int, void*, std::less<int>, std::allocator<std::pair<const int, void*> > >, CloneAllocator = boost::heap_clone_allocator] This looks like it's recommending the function that should be working. I've been poking at this for quite a while and cannot find a clue why this is not working. Thank you for the help, ...Duane ...Duane