Problem with subform

[Access Gorilla]

I have set up a database with two tables and am trying to make a form with a subform. when I add the second record to the subform I get an error message stating that I can not have two records with duplicate index numbers. I am sure there is a way to have multiple records in on table that conect to one record in another and be able to enter that data in one form. Thanks for any help anyone can provide.

The Gorilla

 

[asarak]

did you have the data from the first table in the main form and from the second table in the subform?

if you do that, you may not have a valid relation in the connection between main form record from table 1 and sub form record(s) on table 2

check this first