Hi. We are using boost in our project, and now with 1.53 and some added options we are unable to compile the boost in Windows. In Linux, the build is OK. It seems, that when compiling under Windows, the path for compiled boost obj files depends on the options specified, so if there are many options specified, the path become too long. With reduced number of options, the build is OK. Build environment: Windows7 64bit, Boost 1.53, VisualStudio 2010 Express Here is the build command: bjam -d2 --toolset=msvc-10.0 variant=debug,release threading=multi link=static runtime-link=shared install boost.locale.std=on boost.locale.icu=off boost.locale.winapi=off boost.locale.posix=off -a --with-log --with-thread --with-system --with-date_time --with-filesystem --with-program_options --with-iostreams --with-regex --with-serialization --with-locale --with-atomic define=BOOST_LOG_NO_SETTINGS_PARSERS_SUPPORT --prefix="c:\projects\cpce-cpp-stack\1.3.0\win" -sZLIB_SOURCE="c:\projects\cpce-cpp-stack\1.3.0\win\third-party\zlib-1.2.7" And the output: Performing configuration checks - iconv (libc) : no - iconv (separate) : no - has_icu builds : no Component configuration: - atomic : building - chrono : not building - context : not building - date_time : building - exception : not building - filesystem : building - graph : not building - graph_parallel : not building - iostreams : building - locale : building - log : building - math : not building - mpi : not building - program_options : building - python : not building - random : not building - regex : building - serialization : building - signals : not building - system : building - test : not building - thread : building - timer : not building - wave : not building ...patience... ...patience... ...patience... ...patience... ...found 30159 targets... ...updating 10944 targets... …. file bin.v2\libs\program_options\build\msvc-10.0\debug\boost.locale.icu-off\boost.locale.posix-off\boost.locale.std-on\boost.locale.winapi-off\link-static\threading-multi\split.obj.rsp "libs\program_options\src\split.cpp" -Fo"bin.v2\libs\program_options\build\msvc-10.0\debug\boost.locale.icu-off\boost.locale.posix-off\boost.locale.std-on\boost.locale.winapi-off\link-static\threading-multi\split.obj" -TP /Z7 /Od /Ob0 /W3 /GR /MDd /Zc:forScope /Zc:wchar_t /wd4675 /EHs -c -DBOOST_ALL_NO_LIB=1 -DBOOST_LOG_NO_SETTINGS_PARSERS_SUPPORT "-I." compile-c-c++ bin.v2\libs\program_options\build\msvc-10.0\debug\boost.locale.icu-off\boost.locale.posix-off\boost.locale.std-on\boost.locale.winapi-off\link-static\threading-multi\split.obj call "C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\vcvarsall.bat" x86 >nul cl /Zm800 -nologo @"bin.v2\libs\program_options\build\msvc-10.0\debug\boost.locale.icu-off\boost.locale.posix-off\boost.locale.std-on\boost.locale.winapi-off\link-static\threading-multi\split.obj.rsp" split.cpp failed to write output file 'bin.v2\libs\program_options\build\msvc-10.0\debug\boost.locale.icu-off\boost.locale.posix-off\boost.locale.std-on\boost.locale.winapi-off\link-static\threading-multi\libboost_program_options-vc100-mt-gd-1_53.lib.rsp'! c:\projects\cpce-cpp-stack\1.3.0\src\boost_1_53_0>cd "c:\projects\cpce-cpp-stack\1.3.0\win" Thank you for advice Best regards Ivan Dundek.