Hi, I am a newbie to using boost accumulators. I have tried a simple program using examples from the boost website. I have something as simple as: #include <boost/accumulators/accumulators.hpp> #include <boost/accumulators/statistics/stats.hpp> #include <boost/accumulators/statistics/tail.hpp> include <boost/accumulators/statistics/tail_quantile.hpp> using namespace boost::accumulators; typedef accumulator_set<double, stats<tag::tail_quantile<right> > > accumulator_t_right; typedef accumulator_set<double, stats<tag::tail_quantile<left> > > accumulator_t_left; accumulator_t_right acc0( tag::tail<right>::cache_size = 1000 ); accumulator_t_right acc1( tag::tail<right>::cache_size = 1000 ); accumulator_t_left acc2( tag::tail<left>::cache_size = 1000 ); accumulator_t_left acc3( tag::tail<left>::cache_size = 1000 ); I am met with: /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:56:63: error: template argument 1 is invalid /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:56:65: error: template argument 1 is invalid /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:56:67: error: template argument 2 is invalid /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:56:88: error: invalid type in declaration before ';' token /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:57:62: error: template argument 1 is invalid /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:57:64: error: template argument 1 is invalid /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:57:66: error: template argument 2 is invalid /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:57:86: error: invalid type in declaration before ';' token /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:59:42: error: template argument 1 is invalid /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:59:56: error: expected unqualified-id before '=' token /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:60:42: error: template argument 1 is invalid /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:60:56: error: expected unqualified-id before '=' token /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:61:41: error: template argument 1 is invalid /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:61:55: error: expected unqualified-id before '=' token /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:62:41: error: template argument 1 is invalid /usr/local/src/freeswitch/src/mod/applications/mod_soundtouch/mod_soundtouch.cpp:62:55: error: expected unqualified-id before '=' token Do I need to use a specific namespace for the right and left arguments? Where are these defined? Or is something else wrong. Any help would be greatly appreciated. Thank you in advance. Regards, Jon