This is the compiler I'm using: C:\Documents and Settings\pedro.lamarao\My Documents\boost\boost_HEAD\libs\seria lization\test>cl Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 13.00.9466 for 80x86 Copyright (C) Microsoft Corporation 1984-2001. All rights reserved. usage: cl [ option... ] filename... [ /link linkoption... ] This is using the "Visual Studio .NET Command Prompt". I have applied a "SDK 1" patch to my installation. And I do have Visual Studio .NET 2003 installed on this machine. But trying to run the Serialization tests today I notice it detecting the vc-7_1 toolset: ...patience... ...patience... ...found 6438 targets... ...updating 4064 targets... MkDir1 ..\..\..\bin\boost\libs\test MkDir1 ..\..\..\bin\boost\libs\test\build MkDir1 ..\..\..\bin\boost\libs\test\build\libboost_test_exec_monitor.lib MkDir1 ..\..\..\bin\boost\libs\test\build\libboost_test_exec_monitor.lib\vc-7_1 etc., and later on: MkDir1 ..\..\..\bin\boost\libs\serialization MkDir1 ..\..\..\bin\boost\libs\serialization\build MkDir1 ..\..\..\bin\boost\libs\serialization\build\libboost_serialization.lib MkDir1 ..\..\..\bin\boost\libs\serialization\build\libboost_serialization.lib\vc-7_1 Has anyone experienced this? I'm trying to help with the vc7 failures in Serialization. -- Pedro Lamarão Desenvolvimento Intersix Technologies S.A. SP: (55 11 3803-9300) RJ: (55 21 3852-3240) www.intersix.com.br Your Security is our Business