Ardupilot Eclipse IDE build error

I am building the ardupilot code on Eclipse IDE in windows, made the build targets and also cloned the ardupilot code with submodules and all things as mentioned in official website. Installed the cygwin for using the waff build automation tool in windows and configured it in Eclipse Project properties. But on running the build commands, Waf configuration works perfectly, but in Waff Copter it shows error like this. I am not able to make out what exactly is the file/tool missing

probably a python issue. Do you use python 3.7?

well, this thing is resolved … wrong directory was set at my path environment