Hi All, I am having the same errors as in this post: http://lists.boost.org/boost-users/2006/09/22001.php I have tried downloading the boost-jam both binary: boost-jam-3.1.13-1-ntx86.zip (I get the same error as the above post) And from source: boost-jam-3.1.13.zip I get a "Debug Assertion Failed!" error when I run build.bat Program: C:\Boost\boost-jam-3.1.13\bootstrap\jam0.exe File: dtoxtm64.c Line: 67 Expression: ( ( ( long )( yr - 1990) >= BASE_YEAR) && ( ( long )( yr - 1990 ) <= _MAX_YEAR64 ) ) Running the prebuilt bjam.exe file in the Threads build directory (running from Visual Studio 2005 Command Prompt): C:\Boost\boost_1_33_1\libs\thread\build>bjam "-sTOOLS=vc-8_0" Built three library files. So I think the bjam.exe file probably is not corrupt. If I run (from Visual Studio 2005 Command Prompt): C:\Boost\boost_1_33_1>bjam "-sTOOLS=vc-8_0 --with-threads" I get the same 00012f2a error as before. Other Notes: I have Visual C++ 2003 Standard and Visual Studio 2005 Pro Installed. Starting with the appropriate command prompt, I get the same error on both at Offset 0001f2fa. My machine is an Dell Latitude Centrinio Running Windows XP Pro SP2. Any help would be greatly appreciated! Thanks, David Cravey