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

Your trigger to change the state of the Next Button to Normal is the problem.  You have it set up to change the state when the final variable changes and the others are true. This variable only changes once, and as a result, the next button never changes to Normal. You also have the problem of learners clicking the buttons out of sequence.

I made four text boxes off the campus with an initial state of hidden.  Then created triggers to change the state of one of the text boxes to normal when the timeline for the layer ends. I created this trigger for each of your layers using a different text box for each layer.

I changed the trigger to change the Next button to normal to:

Change the state of the next button to normal when the state of each text box is normal.

Lastly, I added a condition to the trigger to disable the next button when the timeline starts. I added: If 1 is = false, or 2 = false, or 3 = false or ischemic = false.

Now it works regardless of the order the buttons are clicked.

See attached.

Thank you So much Judy and Garth. That was really helpful! I am learning more about Storyline every time I have those complicated issues. 

Garth, Thank you for fixing and sharing the slide. It took me hours to try to fix that with no result. Now, I do understand what was going on. Thanks for your effort!