I have created a series forms with sub-forms for a scheduling program. Each of these forms has a table for there data and there are 28 eight of these forms. Then I took these forms and set them in as a sub-form on one primary form. When I tab through these forms or refresh the primary form the first sub form disappears. Has anyone had this happen or know what causes this. When I close the primary form and open it again it comes right back.