Normally when debugging a program in Visual Studio 2005, the debugger will let the user break the program if it asserts. But when the program in a Boost.Test runner, that doesn't happen. In this thread [1] other people report the same problem but Gennadiy says that it should work. Was this ever fixed? I'm using Boost 1.50. [1] http://boost.2283326.n4.nabble.com/BOOST-ASSERT-any-one-against-improving-de... Thanks, Alex -- Swish - Easy SFTP for Windows Explorer (http://www.swish-sftp.org)