Have just bought the book and downloaded the source it all looks cool.... BUT Can't build a thing! Managed to get hold of AllExamples.dsw eventually converted it to a new VC7 solution ok (few errors on some projects). But no builds, cannot build any of my own code with BGL either. HELP. This is the jist of it:- ------ Build started: Project: dfs_example, Configuration: Debug Win32 ------ Compiling... dfs-example.cpp ../boost_1_25_1\boost\type_traits\cv_traits.hpp(188) : fatal error C1001: INTERNAL COMPILER ERROR (compiler file 'msc1.cpp', line 2844) Please choose the Technical Support command on the Visual C++ Help menu, or open the Technical Support help file for more information Build log was saved at "file://c:\BGL\VC++ Projects\Debug\BuildLog.htm" dfs_example - 1 error(s), 0 warning(s) ---------------------- Done ---------------------- Build: 0 succeeded, 1 failed, 0 skipped The cv traits class seems to trigger the compiler to crash horribly. I don't even know what this class does yet. (only got to page 55 of the book!) Anyone know a workaround? Anyone tried VC7 with boost yet? Is there a microsoft patch yet? Can't go back to VC6 as am using other new libraries. Thanks David Marsh