Unable to build the "helloworld-complex" example

Trying to open and build the project:

...qbs\examples\helloworld-complex\hello.qbs

leads to an error for Debug target:

17:14:32: Running steps for project hello...
compiling foo.cpp
compiling main.cpp
compiling specialfeature.cpp
C:\Program Files\Microsoft Visual Studio 12.0\VC\BIN/cl.exe /nologo /c /EHsc /Zi /MDd /DUNICODE /D_UNICODE /DSOMETHING /DHAVE_MAIN_CPP /D_DEBUG /DHAS_SPECIAL_FEATURE "/DWINVER=0x501" "/D_WIN32_WINNT=0x501" "/D_WIN32_WINDOWS=0x501" /FoE:\git\ng\999\qbs\examples\build-hello-Desktop_msvc_qt4-Debug\qtc_Desktop__2a61a8ab-debug\HelloWorld-Complex.qtc-Desktop--2a61a8ab.2ff08137\.obj\f27fede2220bcd32\main.cpp.obj E:\git\ng\999\qbs\examples\helloworld-complex\src\main.cpp /TP
E:\git\ng\999\qbs\examples\helloworld-complex\src\main.cpp : fatal error C1041: cannot open program database 'e:\git\ng\999\qbs\examples\build-hello-desktop_msvc_qt4-debug\qtc_desktop__2a61a8ab-debug\helloworld-complex.qtc-desktop--2a61a8ab.2ff08137\.obj\vc120.pdb'; if multiple CL.EXE write to the same .PDB file, please use /FS
Process failed with exit code 2.
The following products could not be built for configuration qtc_Desktop__2a61a8ab-debug:
HelloWorld-Complex
Error while building/deploying project hello (kit: Desktop (msvc, qt4))
When executing step "Qbs Build"
17:14:32: Elapsed time: 00:00.

Also, at opening of project, always reported an warning:

:-1: warning: Unknown property: cpp.cxxCompilerName