Hi, I am currently creating a cinema system using access where a booking can be made for a event. Each event when it is shown is categoriesd as a performance. A booking must be made for each performamce. I have a constructed a query between the booking, event and peformance tables and created a subform on the booking form. The event table is linked to preformance which in turn is linked to Booking. I keep getting the I"ndex or primary key cannot contain a Null value. (Error 3058)" message, I have looked everywhere and every primary key is filled. Can anyone help please?
