title: Error 21007: status result returned by Apple during in-app subscription restore
body: <p>We are testing 'restore subscription' using Apple's new in-app subscription model.  The In App Purchase Programming Guide lists 6 status codes that are returned by the Apple server during the restoration/purchase process ("Verifying an Auto-renewable receipt" - page 33/34).
  However, the errors start at 21000 and end at 21006. We just tried to restore a subscription and received a status result of 21007. I have googled this error and am not finding any information about what this status result means.
  Thank you in advance ....</p>
  
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  <p>Error 21008 is also another Error response that Apple returns if you point to the wrong production/sandbox server.</p>