Hi, i am under the impression boost.python supported python 3 for a while now. But trying to compile it using python 3.1.2 gives me the old errors: .\boost/python/converter/builtin_converters.hpp(138) : error C2039: 'PyInt_FromLong' : is not a member of '`global namespace'' .\boost/python/converter/builtin_converters.hpp(138) : error C3861: 'PyInt_FromLong': identifier not found .\boost/python/converter/builtin_converters.hpp(138) : error C2065: 'PyInt_Type' : undeclared identifier .\boost/python/converter/builtin_converters.hpp(138) : error C2039: 'PyInt_FromLong' : is not a member of '`global namespace'' .\boost/python/converter/builtin_converters.hpp(138) : error C3861: 'PyInt_FromLong': identifier not found .\boost/python/converter/builtin_converters.hpp(138) : error C2065: 'PyInt_Type' : undeclared identifier .\boost/python/converter/builtin_converters.hpp(138) : error C2039: 'PyInt_FromLong' : is not a member of '`global namespace'' .\boost/python/converter/builtin_converters.hpp(138) : error C3861: 'PyInt_FromLong': identifier not found .\boost/python/converter/builtin_converters.hpp(144) : error C2039: 'PyInt_FromLong' : is not a member of '`global namespace'' .\boost/python/converter/builtin_converters.hpp(144) : error C3861: 'PyInt_FromLong': identifier not found .\boost/python/converter/builtin_converters.hpp(144) : error C2065: 'PyInt_Type' : undeclared identifier .\boost/python/converter/builtin_converters.hpp(144) : error C2039: 'PyInt_FromLong' : is not a member of '`global namespace'' .\boost/python/converter/builtin_converters.hpp(144) : error C3861: 'PyInt_FromLong': identifier not found .\boost/python/converter/builtin_converters.hpp(144) : error C2065: 'PyInt_Type' : undeclared identifier .\boost/python/converter/builtin_converters.hpp(144) : error C2039: 'PyInt_FromLong' : is not a member of '`global namespace'' .\boost/python/converter/builtin_converters.hpp(144) : error C3861: 'PyInt_FromLong': identifier not found my user-config.jam: using python : 3.1 : "C:\\Program Files\\python31\\python" : "C:\\Program Files\\python31\\include" : "C:\\Program Files\\python31\\libs" : #condition : #ext suffix ; Regards -chris