Slide next button does not function when revisiting

There are a few issues with the slide: 

• The current trigger that disables the NEXT button will always run when the user returns to the slide. That means the user has to do whatever it takes to make the trigger run that enables the NEXT button. If they can't do that, NEXT stays disabled.
  • The best way to avoid this issue is to add the necessary conditions to the disable-Next trigger, so it won't run again. For example, add conditions so it won't run if all of the T/F variables are True. 
• The NEXT button is enabled when the ischemic1 variable changes, with the condition that the other variables = True. The "ischemic1" variable changes to true after the user clicks the "How common" button and the associated 4th layer ends.
  • That trigger works if the user clicks the "How common" button after they click the other 3 buttons and view those layers.
  • But if they decide to view "How common" before the other variables are changed, the trigger will never run, because the "ischemic1" variable won't change again. 
• There's nothing that prevents the user from clicking all the buttons on the base without listening to the audio on each layer. Since the variables change when the layers' timelines end, those variables might not change to True. But the user wouldn't understand why they couldn't continue.

This post has info about various ways to control the NEXT button, including how to require them to finish each layer: TIP: Controlling the NEXT Button 101 - Articulate Storyline Discussions - E-Learning Heroes

You might also find these posts helpful: 

• for controlling clicks from layers: Make voice over mandatory - Articulate Storyline Discussions - E-Learning Heroes 
• for using one object with states (instead of a group): Change state of Next button when user visits 3 of 7 layers. - Articulate Storyline Discussions - E-Learning Heroes