Hi, config/compiler/visualc.hpp, line 131: # if defined(UNDER_CE) # if _MSC_VER < 1200 // Note: these are so far off, they are not really supported # elif _MSC_VER < 1300 // eVC++ 4 comes with 1200-1202 # define BOOST_COMPILER_VERSION evc4.0 # error unknown CE compiler // ????!!!!!!! # else # error unknown CE compiler # endif I believe this is typo... Regards, MB p-stade.sourceforge.net