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Invalid index definition. (Error 3285)

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

Applies to: Access 2013 | Access 2016

Possible causes:

You are using the same field twice in an index or relationship, which the Microsoft Access database engine does not permit. You are creating a relationship using fields with data types that do not match. In Microsoft Access database engine databases, you can only relate fields with identical data types or a AutoNumber field with a Number field set to a Long Integer. ACCESS SUPPORT RESOURCES
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