id summary reporter owner description type status milestone component version severity resolution keywords cc 3105 error C2872: 'time_t' : ambiguous symbol in microsec_time_clock.hpp line 168 : Kevin Duffy az_sw_dude "Using MS Visual Studio 2008, If I have a time_t type defined, this error will occur as the compile can't resolve if the time_t is my type or the one from the one in \microsoft visual studio 9.0\vc\include\crtdefs.h(580) : __time32_t time_t The fix is trivial; simply need to qualify the time_t in the static_cast of the cited line. diff attached. " Bugs closed Boost 1.40.0 date_time Boost 1.37.0 Problem fixed