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Cannot start your application. The workgroup information file is missing or opened exclusively by another user. (Error 3028)

office 365 dev account|Last Updated: 6/12/2017
1 Contributor

Applies to: Access 2013 | Access 2016

To ensure referential integrity in databases created by the Microsoft Access database engine, your application must read the database's System.mdw file. Make sure the file is in the location specified in the SystemDB value in the Windows Registry.

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