Can't create bar file - Error preparing application descriptor file

I followed all steps of how to configure BlackBerry 10 NDK with QtCreator 2.6.1 but I can’t create bar package. Building the app works fine, but when I try to run or deploy it, I receive this error Error preparing application descriptor file Error while building/deploying project untitled (kit: BlackBerry 10 arm) When executing step 'Create BAR packages' What’s the problem here ?