Hi, I get the following error compiling with MSVC toolset arhcitecture=x86 address-model=64: C:\boost-cvs\boost\boost/numeric/interval/hw_rounding.hpp(36) : fatal error C1189: #error : Boost.Numeric.Interval: Please specify rounding control mechanism. The source code is taken form RC4 head today (15-aug-2006). Is there something wrong with my setup or it's a feature ;-)? In header file that there is no handling of x64 whatsoever. So, it should be a feature. Can anyone advice an acceptable workaround? Artem.