All available subscriptions for the requested channel have been exhausted.
You get this error when you try to up2date your RHEL Box as shown below
Problem registering system: Ã¢ Ã¢ Ã¢ Ã¢ Error Class Code: 70 Ã¢ Ã¢ Error Class Info: Ã¢ Ã¢ All available subscriptions for the Ã¢ Ã¢ requested channel have been exhausted. Ã¢ Ã¢ Please contact a Red Hat Network Sales Ã¢ Ã¢ associate. Ã¢ Ã¢ Explanation: Ã¢ Ã¢ An error has occurred while processing Ã¢ Ã¢ your request. If this problem Ã¢ Ã¢ persists please enter a bug report at Ã¢ Ã¢ bugzilla.redhat.com. Ã¢ Ã¢ If you choose to submit the bug report, Ã¢ Ã¢ please be sure to include Ã¢ Ã¢ details of what you were trying to do Ã¢ Ã¢ when this error occurred and Ã¢ Ã¢ details on how to reproduce this problem.
To solve this problem you need to get additional subscription from redhat.