Still no solution. I tried setting up multi-field keys and that has worked for some of the problems. There is one table that has participant name as part of the key and it is frequently left blank by the participants. This allows multiple records without data to be entered with the same blank key. I have tried to set up referential integrity between tables, but the choice is grayed out when I try to set up the connection. I have used queries, etc to prove that there is no problem with orphan entries, but the choices are still grayed out. How can I establish connections between tables after there are records in the tables?:banghead: