hello, On VS.net 2003 compiler, I'm building the boost library using the following commands/setitngs/procedure: 1. build bjam.exe using build.bat; 2. build boost with a .bat file with the following contents, under the boost root folder: SET PYTHON_ROOT="D:\Python24" SET PYTHON_VERSION=2.4.2 SET STLPORT_PATH="D:\" SET STLPORT_50_PATH="D:\STLport_50" SET STLPORT_VERSION=5.0 SET STLPORT_VERSIONS=5.0 SET VC71_ROOT="d:\Program Files\Microsoft Visual Studio .NET 2003\Vc7" Bjam.exe -sBOOST_ROOT=. -sTOOLS=vc-7_1 "-sBUILD=debug release <runtime-link>static/dynamic <threading>single/multi" stage Bjam.exe -sBOOST_ROOT=. -sTOOLS=vc-7_1-stlport "-sBUILD=debug release <runtime-link>static/dynamic <threading>single/multi" stage 3. I get the lib files in <boost>\stage\lib folder. In my test app, I'm using boost::regex lib and some others. And I'm using STLport 5.0 by placing the STLport include file path before the vender's default include path. But I'm getting the following compiling error: e:\Lib\boost_1_33_1\boost\config\auto_link.hpp(211) : fatal error C1189: #error : "Build options aren't compatible with pre-built libraries" After commenting out the code related to boost::regex, every thing seems to be OK. And after I disable linking to STLport by changing the include file searching order, it's also OK. Can anybody give me some hint on this? Thanks a lot. Max