outer odbc

tengo el siguiente select SELECT Cats.Cat AS Cat, Cats.CatId AS CatId,SubCats.Cat AS SubCat,SubCats.CatId AS SubCatId FROM (Cats LEFT JOIN Cats AS SubCats ON SubCats.ParentId = Cats.CatId) WHERE Cats.ParentId IS NULL ORDER BY Cats.Cat que funciona ...

Recibo este mensaje de error al querer ejecutar una consulta SQl - Microsoft OLE DB Provider for ODBC Drivers error '80040e14' [Microsoft][ODBC Microsoft Access Driver] You tried to execute a query that does not include the specified expression ...