I've moved to a new machine, and I can run bjam jobs from trunk, but when I try to run sandbox jobs, I am baffled by this message. Unable to load Boost.Build: could not find build system. --------------------------------------------------------- I:\boost-sandbox\boost-build.jam attempted to load the build system by invoking 'boost-build ;' but we were unable to find "bootstrap.jam" in the specified directory Unhelpfully, it doesn't seem to reveal what the 'specified directory' actually is. The files were copied over from a working system, so I can't see what has changed. The jamfile(s) are unchanged. I've got the following environment variables set: I:\boost-sandbox>set boost boost_build_path=i:\boost_1_44_0\tools\build\v2 boost_patches=i:\boost-patches boost_root=i:\boost_1_44_0 boost_sandbox=i:\boost-sandbox boost_trunk=i:\boost-trunk I:\boost-sandbox>bjam --debug_configuration just produces this message. I:\boost-sandbox>bjam -d5 --debug_configuration > debug.log produces the attached log, and the trunk log for comparison. Help! Thanks Paul PS Boost build is undoubtedly clever, but, sadly, not nearly clever enough for the abuse of very many users, judging by the Google entries for the above error message :-( --- Paul A. Bristow, Prizet Farmhouse, Kendal LA8 8AB UK +44 1539 561830 07714330204 pbristow@hetp.u-net.com