I really don't remember where in the WEB i found this article, but it is useful when you want to delete e.g. all the Tables from database but the existing relations don't allow you to go on, OR Access fails to display relations between tables in the Relationships window. Since you could not view the relationships, you could not delete them, so your database was inconsistent. This code is provided as a fix.
Function DeleteAllRelationships() As String
' WARNING: Deletes all relationships in the current database.
Dim db As Database ' Current DB Dim rex As Relations ' Relations of currentDB. Dim rel As Relation ' Relationship being deleted. Dim iKt As Integer ' Count of relations deleted. Dim sMsg As String ' MsgBox string.
sMsg = "About to delete ALL relationships between tables in the current database." & vbCrLf & "Continue?"
If MsgBox(sMsg, vbQuestion + vbYesNo + vbDefaultButton2, "Are you sure?") = vbNo Then DeleteAllRelationships = "Operation cancelled" Exit Function
Set db = CurrentDb Set rex = db.Relations iKt = rex.Count Do While rex.Count > 0 Debug.Print rex(0).Name rex.Delete rex(0).Name