Can anyone tell me why the line: time_period t4(t2); in the attached cpp file doesn't compile but the line: time_period t3(t1); does? it seems like i should be calling the same copy constructor in both cases but g++ 3.3.4 complains: error: no matching function for call to ` boost::date_time::period<boost::posix_time::ptime, boost::posix_time::time_duration>::period(boost::posix_time::time_period (&)(boost::posix_time::ptime, boost::posix_time::ptime))' /usr/include/boost/date_time/period.hpp:64: error: candidates are: boost::date_time::period<boost::posix_time::ptime, boost::posix_time::time_duration>::period(const boost::date_time::period<boost::posix_time::ptime, boost::posix_time::time_duration>&) /usr/include/boost/date_time/period.hpp:109: error: boost::date_time::period<point_rep, duration_rep>::period(point_rep, duration_rep) [with point_rep = boost::posix_time::ptime, duration_rep = boost::posix_time::time_duration] /usr/include/boost/date_time/period.hpp:99: error: boost::date_time::period<point_rep, duration_rep>::period(point_rep, point_rep) [with point_rep = boost::posix_time::ptime, duration_rep = boost::posix_time::time_duration] //--------------------------------cut here------------------- #include "boost/date_time/posix_time/posix_time_types.hpp" #include "boost/date_time/gregorian/gregorian_types.hpp" int main() { using namespace boost::posix_time; using namespace boost::gregorian; //---------------------------------------------- date dmin( min_date_time) ; ptime tmin( dmin ); date dmax( max_date_time) ; ptime tmax( dmax ); time_period t1( tmin, tmax ); //--------------------------------------------- time_period t2( ptime(min_date_time), ptime(max_date_time) ); //why does this compile (on g++ 3.3.4) time_period t3(t1); //but this doesn't? i.e., why isn't a time_period a time_period a time_period? time_period t4(t2); return 0; } __________________________________ Do you Yahoo!? All your favorites on one personal page � Try My Yahoo! http://my.yahoo.com