Hi: The following is the output I am currently getting with the current trunk when trying to compile with visual c++ 9, tried with visual c++ 8 and got a similar error: C:/Program Files/boost/tools/build/v2/tools\msvc.jam:1040: syntax error at keyword = C:/Program Files/boost/tools/build/v2/build\toolset.jam:38: in toolset.using rule msvc.init unknown in module toolset. C:/Program Files/boost/tools/build/v2\build-system.jam:465: in process-explicit-toolset-requests C:/Program Files/boost/tools/build/v2\build-system.jam:545: in load C:\Program Files\boost\tools\build\v2/kernel\modules.jam:283: in import C:\Program Files\boost\tools\build\v2\kernel\bootstrap.jam:138: in boost-build C:\Program Files\boost\boost-build.jam:17: in module scope Hope this helps. Sean.