The ptr_container header files seem to be causing a lot of very verbose and annoying warning messages on Visual Studio 2008 at warning level 4 (highest). I'm not sure if this is my fault or what, but I was hoping you guys could verify if this is your issue or mine. Thanks. Below are the warnings I'm getting: 1>c:\it\personal\collision\sdk\boost\boost\ptr_container\detail\move.hpp(23) : warning C4512: 'boost::ptr_container_detail::move_ptrs::move_source<Ptr>' : assignment operator could not be generated 1> with 1> [ 1> Ptr=boost::ptr_container_detail::static_move_ptr<Object,boost::ptr_container_detail::clone_deleter<boost::ptr_container_detail::reversible_ptr_container<boost::ptr_container_detail::sequence_config<Object,std::vector<void *,std::allocator<void *>>>,boost::heap_clone_allocator>::null_clone_allocator<false>>> 1> ] 1> c:\it\personal\collision\sdk\boost\boost\ptr_container\ptr_sequence_adapter.hpp(182) : see reference to class template instantiation 'boost::ptr_container_detail::move_ptrs::move_source<Ptr>' being compiled 1> with 1> [ 1> Ptr=boost::ptr_container_detail::static_move_ptr<Object,boost::ptr_container_detail::clone_deleter<boost::ptr_container_detail::reversible_ptr_container<boost::ptr_container_detail::sequence_config<Object,std::vector<void *,std::allocator<void *>>>,boost::heap_clone_allocator>::null_clone_allocator<false>>> 1> ] 1> c:\it\personal\collision\sdk\boost\boost\ptr_container\ptr_sequence_adapter.hpp(179) : while compiling class template member function 'void boost::ptr_sequence_adapter<T,VoidPtrSeq,CloneAllocator>::push_back(Object *)' 1> with 1> [ 1> T=Object, 1> VoidPtrSeq=std::vector<void *,std::allocator<void *>>, 1> CloneAllocator=boost::heap_clone_allocator 1> ] 1> c:\it\personal\collision\sdk\boost\boost\ptr_container\ptr_vector.hpp(35) : see reference to class template instantiation 'boost::ptr_sequence_adapter<T,VoidPtrSeq,CloneAllocator>' being compiled 1> with 1> [ 1> T=Object, 1> VoidPtrSeq=std::vector<void *,std::allocator<void *>>, 1> CloneAllocator=boost::heap_clone_allocator 1> ] 1> c:\it\personal\collision\source\world.h(20) : see reference to class template instantiation 'boost::ptr_vector<T>' being compiled 1> with 1> [ 1> T=Object 1> ] 1>c:\it\personal\collision\sdk\boost\boost\ptr_container\detail\reversible_ptr_container.hpp(245) : warning C4127: conditional expression is constant 1> c:\it\personal\collision\sdk\boost\boost\ptr_container\detail\reversible_ptr_container.hpp(244) : while compiling class template member function 'void boost::ptr_container_detail::reversible_ptr_container<Config,CloneAllocator>::enforce_null_policy(const Object *,const char *)' 1> with 1> [ 1> Config=boost::ptr_container_detail::sequence_config<Object,std::vector<void *,std::allocator<void *>>>, 1> CloneAllocator=boost::heap_clone_allocator 1> ] 1> c:\it\personal\collision\sdk\boost\boost\ptr_container\ptr_sequence_adapter.hpp(132) : see reference to class template instantiation 'boost::ptr_container_detail::reversible_ptr_container<Config,CloneAllocator>' being compiled 1> with 1> [ 1> Config=boost::ptr_container_detail::sequence_config<Object,std::vector<void *,std::allocator<void *>>>, 1> CloneAllocator=boost::heap_clone_allocator 1> ] 1>c:\it\personal\collision\sdk\boost\boost\ptr_container\detail\reversible_ptr_container.hpp(247) : warning C4127: conditional expression is constant 1>c:\it\personal\collision\sdk\boost\boost\ptr_container\detail\reversible_ptr_container.hpp(110) : warning C4127: conditional expression is constant 1> c:\it\personal\collision\sdk\boost\boost\ptr_container\detail\reversible_ptr_container.hpp(109) : while compiling class template member function 'void boost::ptr_container_detail::reversible_ptr_container<Config,CloneAllocator>::null_clone_allocator<allow_null_values>::deallocate_clone(const Object *)' 1> with 1> [ 1> Config=boost::ptr_container_detail::sequence_config<Object,std::vector<void *,std::allocator<void *>>>, 1> CloneAllocator=boost::heap_clone_allocator, 1> allow_null_values=false 1> ] 1> c:\it\personal\collision\sdk\boost\boost\ptr_container\detail\reversible_ptr_container.hpp(52) : see reference to class template instantiation 'boost::ptr_container_detail::reversible_ptr_container<Config,CloneAllocator>::null_clone_allocator<allow_null_values>' being compiled 1> with 1> [ 1> Config=boost::ptr_container_detail::sequence_config<Object,std::vector<void *,std::allocator<void *>>>, 1> CloneAllocator=boost::heap_clone_allocator, 1> allow_null_values=false 1> ] 1> c:\it\personal\collision\sdk\boost\boost\ptr_container\detail\static_move_ptr.hpp(85) : see reference to function template instantiation 'void boost::ptr_container_detail::clone_deleter<CloneAllocator>::operator ()<Object>(const T *) const' being compiled 1> with 1> [ 1> CloneAllocator=boost::ptr_container_detail::reversible_ptr_container<boost::ptr_container_detail::sequence_config<Object,std::vector<void *,std::allocator<void *>>>,boost::heap_clone_allocator>::null_clone_allocator<false>, 1> T=Object 1> ] 1> c:\it\personal\collision\sdk\boost\boost\ptr_container\detail\static_move_ptr.hpp(85) : while compiling class template member function 'boost::ptr_container_detail::static_move_ptr<T,Deleter>::~static_move_ptr(void)' 1> with 1> [ 1> T=Object, 1> Deleter=boost::ptr_container_detail::clone_deleter<boost::ptr_container_detail::reversible_ptr_container<boost::ptr_container_detail::sequence_config<Object,std::vector<void *,std::allocator<void *>>>,boost::heap_clone_allocator>::null_clone_allocator<false>> 1> ] 1> c:\it\personal\collision\sdk\boost\boost\ptr_container\ptr_sequence_adapter.hpp(182) : see reference to class template instantiation 'boost::ptr_container_detail::static_move_ptr<T,Deleter>' being compiled 1> with 1> [ 1> T=Object, 1> Deleter=boost::ptr_container_detail::clone_deleter<boost::ptr_container_detail::reversible_ptr_container<boost::ptr_container_detail::sequence_config<Object,std::vector<void *,std::allocator<void *>>>,boost::heap_clone_allocator>::null_clone_allocator<false>> 1> ] 1> c:\it\personal\collision\sdk\boost\boost\ptr_container\ptr_sequence_adapter.hpp(179) : while compiling class template member function 'void boost::ptr_sequence_adapter<T,VoidPtrSeq,CloneAllocator>::push_back(Object *)' 1> with 1> [ 1> T=Object, 1> VoidPtrSeq=std::vector<void *,std::allocator<void *>>, 1> CloneAllocator=boost::heap_clone_allocator 1> ]