Hello, I'm having problems building release 1.28 with MSVC 6/STLPort 4.5.3/bjam on Windows NT 4. It seems that bjam tries to make a very VERY deep directory tree which at some point becomes too large due to path name limitations. By looking at the trace messages it seems something is very wrong there :) -- the directory tree is modelled after the command line options with some of the options repeated with different values at different levels in the tree. For example the following target fails (and there a few cases similar to this one; so that nothing gets compiled): mkdir libs\regex\build\bin\libboost_regex.lib\msvc- stlport\stlport-iostream-on\debug-symbols-on\exception-handling- on\inlining-off\optimization-off\rtti-on\runtime-build-debug\runtime- link-dynamic\stlport-cstd-namespace-std\stlport-iostream-off ...failed MkDir1 libs\regex\build\bin\libboost_regex.lib\msvc- stlport\stlport-iostream-on\debug-symbols-on\exception-handling- on\inlining-off\optimization-off\rtti-on\runtime-build-debug\runtime- link-dynamic\stlport-cstd-namespace-std\stlport-iostream-off... Notice how the path includes both stlport-iostream-off and stlport- iostream-on components. The command line I was using: bjam \ -sTOOLS=msvc-stlport \ -sBUILD=stlport-iostream-on -sSTLPORT_4.5.3_PATH="h:\PROGRA~1\MICROS~1\VC98\INCLUDE\stlport" The MSVC-specific environment was set up correctly (MSVCDir, INCLUDE, LIB). The STLPORT_4.5.3_PATH points to the directory containing the STLPort headers. What am I doing whrong? Thanks, D.P.