This just started happening: cd c:/tmp/ myjam -sTOOLS=gcc foo.obj BD Software STL Message Decryptor v2.43 for gcc c:\tmp\../boost/tools/build/v1\testing.jam:51: in boost-test *** argument error * rule get-library-name ( path ) * called with: ( ) * missing argument path c:\tmp\../boost/tools/build/v1\testing.jam:21:see definition of rule 'get-library-name' being called c:\tmp\../boost/tools/build/v1\testing.jam:470: in run Jamfile:3: in load-jamfiles c:\tmp\..\boost\tools\build\v1\bootstrap.jam:22: in boost-build c:\tmp\boost-build.jam:6: in module scope Compilation finished at Tue Jul 13 08:46:09 -- Dave Abrahams Boost Consulting http://www.boost-consulting.com