Hi: When building boost regex with icu support with in the C:\Program Files\boost\Boost_trunk\bin.v2\libs\regex\build\msvc-8.0\release\ I have a build-no directory. What is this directory. It appears to build fine, and aditionally seems to be the static library. Any information apreciated. Sean. __________ Information from ESET NOD32 Antivirus, version of virus signature database 3423 (20080906) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com