From the main menu, select Snapshot followed by Validate record access. This option processes records within the snapshot database and verifies that they can be accessed by the program. In essence, for each record, it makes sure that the record will be accessed if dancers are in the starting position as specified in the before picture. There is a check box option to Delete duplicate records which, when checked, marks a record as deleted if the removal of that record would not affect the program being able to execute the call from all the positions contained within that record (i.e., if you have two identical records in the database, and you try to access them, only one of them will be accessed. When Delete duplicate records is checked, the non-accessed records are deleted).