i have 2 tables that share a one to one relationship. the problem is that when i enter the data into a form, i get an "unable to add or change data in table1 because of related data in table2. it seems there is a "must have" relationship between the 2 tables, when i really need a "may have" relationship between the two. is this changed in the properties tab? how can i tell by looking at the relationships? oracle uses a hashed mark connecting the two tables for "may have" and a solid line for "must have". my tables have a single solid line connecting them. thanks