In the matter of purchasing the application "Your order cannot be processed"?

Question

I worked in “Subscribing to the application”, I followed all the steps given at http://www.robotmedia.net/2011/06/android-billing-library-in-app-billing-made-simple/ , all works fine, but when I try to buy and make a payment, I got "Your payment could not be processed. Please try again", and I go to the journal, I got some errors, for example

03-11 18:19:14.489: E/Volley(10235): [13] BasicNetwork.performRequest: Unexpected response code 500 for https://android.clients.google.com/fdfe/completePurchase 03-11 18:19:14.535: W/Finsky(10235): [1] CheckoutPurchase.onErrorResponse: DisplayErrorMessage[Your order could not be processed. Please try again.] 03-11 18:19:14.539: E/Finsky(10235): [1] CheckoutPurchase.setError: type=UNKNOWN, code=-1, permissionCode=-1, message=Your order could not be processed. Please try again. 

I have been punching my head over the past three days. Can anyone help me solve this problem. Thanks in advance.

Answer 1

This usually means that you are using the same account to buy an in-app purchase, like the one you are selling with an in-app purchase. Google does not allow this.

If you want to do this for testing, please see the following page: http://developer.android.com/google/play/billing/billing_testing.html