Hi Oliver, I am interested in testing your Context Library. This time I am using MSVC 9 on Windows XP (32-bits). I compiled the library in this way bjam --build-dir="C:\Program Files\boost\boost_1_46_0" --toolset=msvc-9.0 --build-type=complete --with-context stage I need to change your "Jamfile.v2" file because my $(BOOST_ROOT) env variable is set to "C:\Program Files\....". The blank space in the envvar causes an error on copy command. I replaced $(CP) $(>) $(TO) by $(CP) $(>) "$(TO)" I didn't test on Unix. What if I have not set the environment variable BOOST_ROOT? Is it strictly necessary? I send the modified Jamfile.v2. Thanks and regards, Fernando Pelliccioni.