Interesting! Thank you Steven for that suggestion, that might have taken me in the right direction. I couldn't work out how to fix the problem with my git version 2.18.0. I have updated my git from 2.18.0 to version 2.20.1. I can't fathom why that would make a difference, but I've started a clean checkout and it's looking much better so far. I appreciate everyone's help, thank you! 

On Tue, Jan 15, 2019 at 12:38 PM Steven Watanabe via Boost-build <boost-build@lists.boost.org> wrote:
AMDG

On 1/14/19 6:26 PM, Ben Ernst via Boost-build wrote:
> Here's the error I'm getting now from a perfectly *clean checkout*.
> Unfortunately I get this *same *error trying to run "bjam --clean".
>
>
> **********************************************************************
> ** Visual Studio 2017 Developer Command Prompt v15.0
> ** Copyright (c) 2017 Microsoft Corporation
> **********************************************************************
> [vcvarsall.bat] Environment initialized for: 'x64'
> C:/90cf73ea/tools/boost_install/.\boost-install-dirs.jam:15: in
> boost-install-dirs.includedir
> ERROR: rule "package.paths" unknown in module "boost-install-dirs".

This error indicates that the the build submodule is not up-to-date.

> C:/90cf73ea/libs/headers/build/../../../tools/boost_install\boost-install.jam:721:
> in boost-install.install-cmake-config
> libs\headers\build\Jamfile:87: in modules.load
> C:/90cf73ea/tools/build/src/build\project.jam:375: in load-jamfile
> C:/90cf73ea/tools/build/src/build\project.jam:64: in load
> C:/90cf73ea/tools/build/src/build\project.jam:89: in load-used-projects
> C:/90cf73ea/tools/build/src/build\project.jam:75: in load
> C:/90cf73ea/tools/build/src/build\project.jam:145: in project.find
> C:/90cf73ea/tools/build/src\build-system.jam:618: in load
> C:\90cf73ea\tools\build\src/kernel\modules.jam:295: in import
> C:\90cf73ea\tools\build\src/kernel/bootstrap.jam:139: in boost-build
> C:\90cf73ea\boost-build.jam:17: in module scope
>

In Christ,
Steven Watanabe
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