Problem with compiling Boost

Warning: "using python" expects a two part (major, minor) version number; got %d.%d\nplatform=%s\nprefix=%s\nexec_prefix=%s\nexecutable=%s' % (version_info[0],version_info[1],platform,prefix,exec_prefix,executable))"  instead
Q:/ExternalLibraries/boost_trunk/tools/build/v2/build\feature.jam:276: in implied-feature from module featureerror: "version_info[1]" is not an implicit feature value
Q:/ExternalLibraries/boost_trunk/tools/build/v2/build\feature.jam:355: in expand-subfeatures-aux from module featureQ:/ExternalLibraries/boost_trunk/tools/build/v2/build\feature.jam:424: in feature.expand-subfeatures from module feature
Q:/ExternalLibraries/boost_trunk/tools/build/v2/build\property.jam:186: in property.expand-subfeatures-in-conditions from module property
Q:/ExternalLibraries/boost_trunk/tools/build/v2/build\property-set.jam:407: in property-set.create-from-user-input from module property-set
Q:/ExternalLibraries/boost_trunk/tools/build/v2/build\property-set.jam:461: in property-set.refine-from-user-input from module property-set
Q:/ExternalLibraries/boost_trunk/tools/build/v2/build\targets.jam:1580: in targets.main-target-requirements from module targets
Q:/ExternalLibraries/boost_trunk/tools/build/v2/tools\builtin.jam:532: in lib from module builtin
Q:/ExternalLibraries/boost_trunk/tools/build/v2/tools\python.jam:680: in declare-libpython-target from module python
Q:/ExternalLibraries/boost_trunk/tools/build/v2/tools\python.jam:925: in configure from module python
Q:/ExternalLibraries/boost_trunk/tools/build/v2/tools\python.jam:110: in python.init from module python
Q:/ExternalLibraries/boost_trunk/tools/build/v2/build\toolset.jam:41: in using from module toolset libs\python\build\Jamfile.v2:16: in modules.load from module Jamfile<Q:\External
Libraries\boost_trunk\libs\python\build>
Q:/ExternalLibraries/boost_trunk/tools/build/v2/build\project.jam:311: in load-jamfile from module project
Q:/ExternalLibraries/boost_trunk/tools/build/v2/build\project.jam:64: in load from module project
Q:/ExternalLibraries/boost_trunk/tools/build/v2/build\project.jam:89: in load-used-projects from module project
Q:/ExternalLibraries/boost_trunk/tools/build/v2/build\project.jam:75: in load from module project
Q:/ExternalLibraries/boost_trunk/tools/build/v2/build\project.jam:145: in project.find from module project
Q:/ExternalLibraries/boost_trunk/tools/build/v2\build-system.jam:552: in load from module build-system
Q:\ExternalLibraries\boost_trunk\tools\build\v2/kernel\modules.jam:289: in import from module modules
Q:\ExternalLibraries\boost_trunk\tools\build\v2/kernel/bootstrap.jam:139: in boost-build from module
Q:\ExternalLibraries\boost_trunk\boost-build.jam:17: in module scope from module

The problem was that boost build helper run my python.bat instead of correct python.exe from %PATH% directory.

To check which python is used enter following param:

b2 --debug-configuration:

notice: [python-cfg] Configuring python...
notice: [python-cfg] Registry indicates Python 2.7 installed at "C:\Python27\"
notice: [python-cfg] Checking interpreter command "python"...
notice: [python-cfg] running command 'python -c "from sys import *; print('version=%d.%d\nplatform=%s\nprefix=%s\nexec_prefix=%s\nexecutable=%s' % (version_info[0],version_info[1],platform,prefix,exec_prefix,executable))" 2>&1'
notice: [python-cfg] ...does not invoke a working interpreter
notice: [python-cfg] Checking interpreter command "C:\Python27\python"...

####HERE####
notice: [python-cfg] running command 'DIR /-C /A:S "C:\Python27\python.exe" 2>&1'
####HERE####

notice: [python-cfg] running command 'C:\Python27\python -c "from sys import *;print('version=%d.%d\nplatform=%s\nprefix=%s\nexec_prefix=%s\nexecutable=%s' % (version_info[0],version_info[1],platform,prefix,exec_prefix,executable))" 2>&1'
notice: [python-cfg] ...requested configuration matched!
notice: [python-cfg] Details of this Python configuration:
notice: [python-cfg]   interpreter command: "C:\Python27\python"
notice: [python-cfg]   include path: "C:\Python27\Include"
notice: [python-cfg]   library path: "C:\Python27\libs"
notice: [python-cfg]   DLL search path: "C:\Python27"