The example for the duration_from_string has a small typo. It reads: time_duration duration_from_string(const std::string&) From delimited string. std::string ts("23:59:59.000"); time_duraton td(duration_from_string(ts)) The type time_duraton should be time_duration. In the current CVS, it looks like the typo is in boost/libs/date_time/xmldoc/time_duration.xml around line 160. Robert Zeh http://home.earthlink.net/~rzeh