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Hi R.E.A Films,
The solution offered in this document may help: E_LIC_ALREADY_FULFILLED_BY_ANOTHER_USER.
In case you continue to experience issues, I am moving this discussion to the Adobe Digital Editions forum, where the experts are best equipped to troubleshoot problems with Digital Editions.
E_LIC_ALREADY_FULFILLED_BY_ANOTHER_USER say that you try to open the eBook with a wrong adobe id. You must used the same adobe ID how used in your tablet.