Hello, we want to use Boost.Exception (1.47.0) with MS Visual Studio 2010 in a project that consists of several DLLs and a main executable. We have situations where we store an error_info into an exception from inside a DLL and access it again from another DLL/the EXE, e.g.: dll.cpp: void func() { BOOST_THROW_EXCEPTION(my_exception() << my_info(42)); } exe.cpp: try { func(); } catch (boost::exception& e) { std::cout << *boost::get_error_info<my_info>(e) << std::endl; } Now at runtime, when the error info is accessed, the following assertion in boost::exception_detail::error_info_container_impl::get() fails: BOOST_ASSERT( BOOST_EXCEPTION_DYNAMIC_TYPEID(*p).type_==ti.type_ ); As far as we can see, this happens because MSVC++ uses seperate type_info objects in each dll/exe, and the above assertion compares pointers to type_infos instead of the objects themselves. We believe this is a bug on the Boost side, since type_info objects for the same type are generally not guaranteed to be unique. Are we correct with that? Thanks, Thorsten