Hi, I am using the function classes in VC6 and have hit a problem The problem is that the compiler can't allocate enough space to build (The error mesages are at the bottom) Nomally you use the /ZmXXX compiler flag to make this bigger but that doesn't work in this case Has anyone hit this before? Is there a simple workaround? In case it makes a differnce the problem arises as follows I have a template class which has instances of boost::function1 and 2 If I build with only one version of my class everything is fine when I have more versions (I need about 12 different types) it stops Vin boost_1_30_0\boost\type_traits\has_trivial_copy.hpp(31): fatal error C1204: compiler limit : internal structure overflow boost_1_30_0\boost\type_traits\has_trivial_copy.hpp(43): see reference to class template instantiation 'boost::detail::has_trivial_copy_impl' being compiled boost_1_30_0\boost\type_traits\is_stateless.hpp(31): see reference to class template instantiation 'boost::has_trivial_copy' being compiled boost_1_30_0\boost\type_traits\is_stateless.hpp(43): see reference to class template instantiation 'boost::detail::is_stateless_impl' being compiled boost_1_30_0\boost\function\function_base.hpp(193): see reference to class template instantiation 'boost::is_stateless' being compiled boost_1_30_0\boost\function\function_template.hpp(431): see reference to class template instantiation 'boost::detail::function::get_function_tag' being compiled boost_1_30_0\boost\function\function_template.hpp(293): see reference to function template instantiation 'void boost::function2::assign_to(less_equal<unsigned char>)' being compil ed