Hi all, I've just started looking at ptr_vector<> and got stuck on the following issue: putting a boost::ptr_vector<Simple> into a map doesn't compile. See the following test case: class Simple { public: virtual ~Simple() { } void foo() { doFoo(); } protected: virtual void doFoo() { } }; void Test() { std::map map; map["key"].push_back(new Simple); } I'm using VS2005 RC1 (8.0.50727.26) and the compiler output is as follows: 1>c:\work\3rd-party\boost\include\boost-1_33\boost/ptr_container/ptr_sequence_adapter.hpp(595) : error C2248: 'boost::ptr_container_detail::reversible_ptr_container::reversible_ptr_container' : cannot access private member declared in class 'boost::ptr_container_detail::reversible_ptr_container' 1> with 1> [ 1> Config=boost::ptr_container_detail::sequence_config>>, 1> CloneAllocator=boost::heap_clone_allocator 1> ] 1> c:\work\3rd-party\boost\include\boost-1_33\boost/ptr_container/detail/reversible_ptr_container.hpp(294) : see declaration of 'boost::ptr_container_detail::reversible_ptr_container::reversible_ptr_container' 1> with 1> [ 1> Config=boost::ptr_container_detail::sequence_config>>, 1> CloneAllocator=boost::heap_clone_allocator 1> ] 1> This diagnostic occurred in the compiler generated function 'boost::ptr_sequence_adapter::ptr_sequence_adapter(const boost::ptr_sequence_adapter &)' 1> with 1> [ 1> T=Simple, 1> VoidPtrSeq=std::vector>, 1> CloneAllocator=boost::heap_clone_allocator 1> ] Can anybody shed some light on the subject? Thanks, Oleg.