[Boost-build] wierd error on b2 headers

Subject: [Boost-build] wierd error on b2 headers
From: Robert Ramey (ramey_at_[hidden])
Date: 2017-10-10 17:36:21

I've updated my copy of the Boost repo.  When I try to run "b2 headers" 
I'm not getting the following.  Anyone know anything about this?

Robert Ramey

$b2 headers
/Users/robertramey/WorkingProjects/modular-boost/tools/build/src/tools/types/docbook.jam:8: 
in load
ERROR: rule "Copyright" unknown in module "docbook".
/Users/robertramey/WorkingProjects/modular-boost/tools/build/src/kernel/modules.jam:295: 
in import
/Users/robertramey/WorkingProjects/modular-boost/tools/build/src/tools/types/register.jam:36: 
in load
/Users/robertramey/WorkingProjects/modular-boost/tools/build/src/kernel/modules.jam:295: 
in import
/Users/robertramey/WorkingProjects/modular-boost/tools/build/src/tools/stage.jam:18: 
in load
/Users/robertramey/WorkingProjects/modular-boost/tools/build/src/kernel/modules.jam:295: 
in import
/Users/robertramey/WorkingProjects/modular-boost/tools/build/src/tools/builtin.jam:27: 
in load
/Users/robertramey/WorkingProjects/modular-boost/tools/build/src/kernel/modules.jam:295: 
in import
/Users/robertramey/WorkingProjects/modular-boost/tools/build/src/build-system.jam:12: 
in load
/Users/robertramey/WorkingProjects/modular-boost/tools/build/src/kernel/modules.jam:295: 
in import
/Users/robertramey/WorkingProjects/modular-boost/tools/build/src/kernel/bootstrap.jam:139: 
in boost-build
/Users/robertramey/WorkingProjects/modular-boost/boost-build.jam:17: in 
module scope
$