Boost - cannot include include file: 'ctype.h'

Question

I install Boost 1.57.0 using the VS 2015 CTP6 command line, and I am at the compilation stage of Boost.Build, but at startup tools\build\bootstrap.bat:

I get a lot of errors below:

e:\boost_1_57_0\tools\build\src\engine\jam.h(34): fatal error C1083: Cannot open include file: 'ctype.h': No such file or directory