Invalid index definition. (Error 3285)
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 don't 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.
See also
- Access for developers forum
- Access help on support.office.com
- Access help on answers.microsoft.com
- Access forums on UtterAccess
- Access developer and VBA programming help center (FMS)
- Access posts on StackOverflow
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