feng@feng:~/OpenSim/trunk/opensim$ bjam
(no frame):*** argument error
* rule scanner.hdrrule ( target : matches * )
* called with: ( <base-object(c-scanner)@1>base.cpp : <base/base> <sstream> <iostream> <cxxabi.h> : base/base.cpp )
* extra argument base/base.cpp
/home/feng/OpenSim/external/boost-build/build/scanner.jam:118:see definition of rule 'scanner.hdrrule' being called

what does this error mean?