Hi Volodya, after checking the "bin\msvc\release\hello.obj.rsp" file i saw that the backslashes was removed from the path name. Input in Jamfile : <include>D:\Temp\boost_1_33_0 Ouput in hello.obj.rsp: -I"D:Tempboost_1_33_0" Should the path substitution fixed in bjam? I changed the backslashes to slashes in Jamfile, removed the bin folder and invoked bjam ... and now it works!!! :) I tryed again the exe hello3 : hello.cpp : <include>$(BOOST_ROOT) ; after removing the bin folder and this works to!!! ..hmmm..??? Thanks a lot Volodya for fast help!! Tino ___________________________________________________________ Was denken Sie über E-Mail? Wir hören auf Ihre Meinung: http://surveylink.yahoo.com/wix/p0379378.aspx