I have searched already in this list and the dev list for these MSVC compiler errors, but none of the solutions have worked so far. I have turned off precompiled headers, built clean, tried defining BOOST_NO_MEMBER_TEMPLATES before including "boost/lambda/lambda.hpp" (or "boost/lambda/bind.hpp"), and I still always get this error under Visual C++ 6 SP5 (Win2k Pro SP3), in both the Debug and Release configurations: Deleting intermediate files and output files for project 'dWin - Win32 Release'. --------------------Configuration: dWin - Win32 Release--------------- ----- Compiling... dwin-button.cpp dwin-common-control.cpp dwin-dialog.cpp C:\TMP\BOOST\BOOST_1_28_0\boost/lambda/detail/lambda_fwd.hpp(31) : fatal error C1001: INTERNAL COMPILER ERROR (compiler file 'msc1.cpp', line 1794) Please choose the Technical Support command on the Visual C++ Help menu, or open the Technical Support help file for more information Not sure what I'm doing wrong..