Exit block not working

[Anke]

Why can't I close my app?

This can happen if you open a Screen more than once. See here: App Inventor Tutorials and Examples: Manager Screen | Pura Vida Apps For example: [grafik]

Controling player after switching screens

Specifically show how you switched the screens. If you open Screen2 from Screen1 with: open another screen.screenName, Screen1 is not closed, but in the background. Therefore, the player is not stopped. Try this to switch the screens: [grafik] In this case Screen1 is closed after Screen2 opens and if you switch back from Screen2 to Screen1 the Player is NOT playing.