Where? I suspect between chair and keyboard. Didn't you read jaeezzy's post pointing out that you're writing "/home/usr" rather than "/home/user"?

If you really have created a directory called /home/usr/.app (why would you do that?), then:
a) sorry
b) please don't release an app that writes to this crazy location
c) paste the output of the command
so that we can check for appropriate file permissions