Whenever I try to create a relationship from this one table to another table i get a message that says no unique index found for the referenced field of the primary table. The one table is a project information table, which has the project number as the primary key. The other table is the store table which has uses store number and company id number as the keys. When I try to relate these two and chose enforce refential integrity, i get the error message. The project info table is the primary table.