Hi there, I'm using VC7.1 and I try to compile the fill_em_up example I found in the cookbook example folder. Unfortunately the it doesn't compile. I have updated my boost to the latest CVS version. Here are the error messages: c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(32) : error C2039: 'category' : is not a member of 'boost::mpl::fusion_iterator<Iterator>' ...... c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(32) : error C2146: syntax error : missing ',' before identifier 'category' c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(32) : error C2065: 'category' : undeclared identifier c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(32) : error C2976: 'boost::fusion::detail::mpl_iterator_category' : too few template arguments c:\boost\boost\fusion\support\detail\mpl_iterator_category.hpp(28) : see declaration of 'boost::fusion::detail::mpl_iterator_category' c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(32) : error C2955: 'boost::fusion::detail::mpl_iterator_category' : use of class template requires template argument list c:\boost\boost\fusion\support\detail\mpl_iterator_category.hpp(28) : see declaration of 'boost::fusion::detail::mpl_iterator_category' c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(32) : error C2955: 'boost::fusion::detail::mpl_iterator_category' : use of class template requires template argument list c:\boost\boost\fusion\support\detail\mpl_iterator_category.hpp(28) : see declaration of 'boost::fusion::detail::mpl_iterator_category' c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(32) : error C2027: use of undefined type 'boost::fusion::detail::mpl_iterator_category' c:\boost\boost\fusion\support\detail\mpl_iterator_category.hpp(28) : see declaration of 'boost::fusion::detail::mpl_iterator_category' c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(33) : error C2146: syntax error : missing ';' before identifier 'category' c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(33) : error C2501: 'boost::fusion::mpl_iterator<Iterator>::category' : missing storage-class or type specifiers with [ Iterator=boost::fusion::extension::begin_implboost::fusion::mpl_sequence_tag::apply>::iterator ] c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(32) : error C2039: 'category' : is not a member of 'boost::mpl::fusion_iterator<Iterator>' with [ Iterator=boost::fusion::extension::next_implboost::fusion::vector_iterator_tag::apply::type ] c:\boost\boost\fusion\sequence\container\vector\detail\vector_n.hpp(68) : see reference to class template instantiation 'boost::fusion::mpl_iterator<Iterator>' being compiled with [ Iterator=boost::mpl::nextboost::fusion::mpl_sequence_tag::apply>::iterator>::iterator_type>::type ] c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(32) : error C2146: syntax error : missing ',' before identifier 'category' c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(32) : error C3861: 'category': identifier not found, even with argument-dependent lookup c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(32) : error C2976: 'boost::fusion::detail::mpl_iterator_category' : too few template arguments c:\boost\boost\fusion\support\detail\mpl_iterator_category.hpp(28) : see declaration of 'boost::fusion::detail::mpl_iterator_category' c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(32) : error C2955: 'boost::fusion::detail::mpl_iterator_category' : use of class template requires template argument list c:\boost\boost\fusion\support\detail\mpl_iterator_category.hpp(28) : see declaration of 'boost::fusion::detail::mpl_iterator_category' c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(32) : error C2955: 'boost::fusion::detail::mpl_iterator_category' : use of class template requires template argument list c:\boost\boost\fusion\support\detail\mpl_iterator_category.hpp(28) : see declaration of 'boost::fusion::detail::mpl_iterator_category' c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(32) : error C2027: use of undefined type 'boost::fusion::detail::mpl_iterator_category' c:\boost\boost\fusion\support\detail\mpl_iterator_category.hpp(28) : see declaration of 'boost::fusion::detail::mpl_iterator_category' c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(33) : error C2146: syntax error : missing ';' before identifier 'category' c:\boost\boost\fusion\sequence\adapted\mpl\mpl_iterator.hpp(33) : error C2501: 'boost::fusion::mpl_iterator<Iterator>::category' : missing storage-class or type specifiers with [ Iterator=boost::mpl::nextboost::fusion::mpl_sequence_tag::apply>::iterator>::iterator_type>::type ] Is that a know problem? Thanks, Christian