I'm using a Jamfile to link against the thread library and from the error message below it seems that there is a mismatch between what autolink expects (libboost_thread-vc71-mt-gd-1_33.lib) and what is actually compiled (boost_thread-vc71-mt-gd-1_33.lib). Does this ring a bell or should I prepare a minimal example that demonstrates the behavior? <error> ...\boost_1_33_0\libs\statechart\example>bjam "-sTOOLS=mingw vc-7_1" "-sMINGW_ROOT_DIRECTORY=C:\ProgramFiles\MinGW" ...found 1173 targets... ...updating 7 targets... vc-Link ..\..\..\bin\boost\libs\statechart\example\PingPongMulti1.exe\vc-7_1\debug\threading-multi\PingPongMulti1-vc71-mt-gd-1_33.exe LINK : fatal error LNK1104: cannot open file 'libboost_thread-vc71-mt-gd-1_33.lib' CALL "C:\Program Files\Microsoft Visual Studio .NET 2003\VC7\bin\VCVARS32.BAT" >nul "C:\Program Files\Microsoft Visual Studio .NET 2003\VC7\bin\link" /nologo /DEBUG /subsystem:console /out:"..\..\..\bin\boost\libs\statechart\example\PingPongMulti1.exe\vc-7_1\debug\threading-multi\PingPongMulti1-vc71-mt-gd-1_33.exe" /LIBPATH:"..\..\..\bin\boost\libs\thread\build\boost_thread.dll\vc-7_1\debug\threading-multi" "boost_thread-vc71-mt-gd-1_33.lib" @"..\..\..\bin\boost\libs\statechart\example\PingPongMulti1.exe\vc-7_1\debug\threading-multi\PingPongMulti1-vc71-mt-gd-1_33.CMD" ...failed vc-Link ..\..\..\bin\boost\libs\statechart\example\PingPongMulti1.exe\vc-7_1\debug\threading-multi\PingPongMulti1-vc71-mt-gd-1_33.exe... ...skipped <@boost!libs!statechart!example!run>PingPongMulti1-vc71-mt-gd-1_33.exe for lack of <@boost!libs!statechart!example\PingPongMulti1.exe\vc-7_1\debug\threading-multi>PingPongMulti1-vc71-mt-gd-1_33.exe... </error> -- Andreas Huber When replying by private email, please remove the words spam and trap from the address shown in the header.