I'm reasonably sure that the install shouldn't copy two _different_ files to the same place/name I'm guessing that one of those shouldn't have the -mt- in the name ================================================================================================= Creating library bin\boost\libs\date_time\build\boost_date_time.dll\vc7.1\debug\threading-multi\boost_date_time-vc71-mt-gd-1_32.lib and object bin\boost\libs\date_time\build\boost_date_time.dll\vc7.1\debug\threading-multi\boost_date_time-vc71-mt-gd-1_32.exp FileClone C:\Boost\lib\boost_date_time-vc71-mt-gd-1_32.dll copy "bin\boost\libs\date_time\build\boost_date_time.dll\vc7.1\debug\boost_date_time-vc71-mt-gd-1_32.dll" "C:\Boost\lib\boost_date_time-vc71-mt-gd-1_32.dll" >NUL: FileClone C:\Boost\lib\boost_date_time-vc71-mt-gd-1_32.dll copy "bin\boost\libs\date_time\build\boost_date_time.dll\vc7.1\debug\threading-multi\boost_date_time-vc71-mt-gd-1_32.dll" "C:\Boost\lib\boost_date_time-vc71-mt-gd-1_32.dll" >NUL: FileClone C:\Boost\lib\boost_date_time-vc71-mt-gd-1_32.lib copy "bin\boost\libs\date_time\build\boost_date_time.dll\vc7.1\debug\boost_date_time-vc71-mt-gd-1_32.lib" "C:\Boost\lib\boost_date_time-vc71-mt-gd-1_32.lib" >NUL: FileClone C:\Boost\lib\boost_date_time-vc71-mt-gd-1_32.lib copy "bin\boost\libs\date_time\build\boost_date_time.dll\vc7.1\debug\threading-multi\boost_date_time-vc71-mt-gd-1_32.lib" "C:\Boost\lib\boost_date_time-vc71-mt-gd-1_32.lib" >NUL: ====================================================================================================== I expect a lot of things are going to fail if my system ever gets around to actually running the tests Victor A. Wagner Jr. http://rudbek.com The five most dangerous words in the English language: "There oughta be a law"