Hey Barada,
This forum is meant for more high level discussion of the platform and services, and your post represents a specific issue for which you're seeing technical support. So, while this thread is off-topic and would be better if posted to Stack Overflow, I'll be happy to provide some advice so you can improve the question before posting there.
* You should include the full stack trace that you observed
* You should make sure that
https://<app-id>.appspot.com/_ah/remote_api is responding to any requests at all using the
curl -v command
* You should ensure that version
alpha-1-1-2 is the default version, and therefore will be serving from
https://<app-id>.appspot.com/_ah/remote_api
* You should attempt to run the appcfg command with the --noisy flag
So, these are the most basic things to check before making your post to Stack Overflow.
Cheers!
Nick
Cloud Platform Community Support