Dears The code: #include typedef boost::tuple Foo; int main() {} Is working. But if I add one more field: #include typedef boost::tuple Foo; int main() {} I have an error: tuple_type.cpp:3: error: wrong number of template arguments (11, should be 10) /usr/include/boost/tuple/detail/tuple_basic.hpp:75: error: provided for ?template class boost::tuples::tuple? tuple_type.cpp:3: error: invalid type in declaration before ?;? token Why this error occurs? My kompiler is gcc 4.1 Regards. -- |\/\/| Seweryn Habdank-Wojewódzki \/\/