I've looked everwhere I know to look (MSDN, SCons archive, Boost archive, etc) and tried tweeking my code every way I know how (and countless other suggestions found Googling), but for some reason I cannot get boost_serialization lib to link into my application. If I build with -DBOOST_SERIALIZATION_NO_LIB, I get LNK2005/LNK2019 errors. MSDN says these are CString related, but their "solution" is only for MFC - which won't work with my setup... I'm using SCons to build my "Custom Makefile" QT application - Visual Studio is basically just an editor for my environment. If I leave off -DBOOST_SERIALIZATION_NO_LIB, I get LNK1104 (can't open Boost Serialization lib file)... even though the path to the Boost Serialization lib is explictily listed on the command line (and it is there)! I think this could have something to do with Microsoft's auto-linking, but I'm not 100% sure. Any pointers would be greatly appreciated. Best wishes, Ben