Hi tehyosh,
I have asked a few different engineers here to look over the issue you are experiencing, and so far no one has been able to guess at what file path is not being found. Do you get the same messages if you run Build.bat or Clean.bat from a command window?
One possible solution to consider would be re-installing Visual Studio. That is normally not something I would suggest unless all other options have been exhausted, but in this case it may be worth trying since we cannot determine what the actual cause of the issue may be.