First I posted basically this message to boost-user list on Monday 5/21 and have yet to receive any replies. If re-posting this message to a different list is inappropriate please forgive me. I do have some additional information. I installed boost 1.34.0 on a Window XP machine using mcvs 8.0 and was again able to successfully build all the boost libraries and received the same errors as on my Mac when I tried to build the boost python example. I was able to discover a rule called python-extension in the file boost_1_34_0/tools/build/v2/python.jam rule python-extension ( name : sources * : requirements * : default- build * : usage-requirements * ) { .... } IMPORT python : python-extension : : python-extension ; I am on a Mac with OS X 10.4 and trying to compile the boost/Python examples in tutorial or quickstart using Bjam v3.1.14 OS=MACOSX. I issue the following command in the boost_1_34_0/libs/python/libs/ example directory bjam --toolset=darwin test I receive the following errors: Jamroot:18: in modules.load rule python-extension unknown in module Jamfile</Users/arthurcoleman/ Boost/boost_1_34_0/libs/python/example>. /Users/arthurcoleman/Boost/boost_1_34_0/tools/build/v2/build/ project.jam:312: in load-jamfile /Users/arthurcoleman/Boost/boost_1_34_0/tools/build/v2/build/ project.jam:68: in load /Users/arthurcoleman/Boost/boost_1_34_0/tools/build/v2/build/ project.jam:170: in project.find /Users/arthurcoleman/Boost/boost_1_34_0/tools/build/v2/build- system.jam:237: in load /Users/arthurcoleman/Boost/boost_1_34_0/libs/python/example/../../../ tools/build/v2/kernel/modules.jam:261: in import /Users/arthurcoleman/Boost/boost_1_34_0/libs/python/example/../../../ tools/build/v2/kernel/bootstrap.jam:132: in boost-build /Users/arthurcoleman/Boost/boost_1_34_0/libs/python/example/boost- build.jam:7: in module scope Can someone help me since I can't figure out what I'm doing wrong. By the way, I have tried as a superuser and get the same errors. It seemed that I was able to successfully install boost from the boost.../build director with the ./configure --toolset=darwin --show- libraries ect. Thanks in advance, Arthur