After having applied the suggestions from John Maddock the errors have dropped considerably. 1) A summary for other regression runners: *) download spirit-1.6.3.zip from http://sourceforge.net/project/showfiles.php?group_id=28447 *) unpack it to DRIVE:\spirit-1.6.3 *) Add to user-config.jam : using msvc : 6.5 : "C:/Program Files/Microsoft Visual Studio/VC98/Bin/cl.exe" : <cxxflags>-I"DRIVE:/spirit-1.6.3/boost" ; using borland : 5.8.2 : "C:/Programm Files/Borland/BDS/4.0/Bin/bcc32.exe" : <cxxflags>-I"DRIVE:/spirit-1.6.3/boost" ; 2) The remaining borland errors: @nicola: Does the spirit-1.6.3 still need a patch, or is this the static link issue? 3) Failing test tests: This is a DLL issue. In file boost/test/test/unit_test_suite_impl.hpp the compiler coplains about base class test_unit not defined, despite it is. The compiler seems to have problems to see this class as defined. Something (possibly templated memebers?) are prohibiting this when the class is flagged as _declspec(dllexport). *) Is this a known issue? *) Can we safely flag these tests as n/a? A comment in libs/test/build/Jamfile.v2 let me believe so. Roland