Hi I use the following type in my application: boost::make_recursive_variant < boost::tuple < std::basic_string<TCHAR>, // id std::basic_string<TCHAR>, // name std::basic_string<TCHAR>, // desc std::basic_string<TCHAR>, // type std::basic_string<TCHAR>, // value std::vectorboost::recursive_variant_ // childList > >::type However when I instantiate it and I try to populate (resize) the vector (member indexed 5 in the tuple, childList) I get: 'boost::recursive_variant_' : class has no constructors from Visual Studio 2008 SP1. It looks like the boost::recursive_variant_ type is not substituted with the type of the enclosing variant by the make_recursive_variant meta-function. Am I missing something ? Is this is bug ? I have also tried adding some more members to the variant, with no success. Thank you, Timothy Madden