I am using using TabbedScreenFlow7 harness in my application. In the screen flow i have 6 assignments. When I click on the screen flow number circles (which displays the top of the harness), pre and post activities of the flow action are not getting invoked. As an effect validation are missing. However i have validation at final assignment flow action. But in between the assignments i need to perform some validaitons. Please suggest how fix this issue. 

Thanks.