The error means you haven’t initialized or created the AudioToBeStopped component. my guess is you added the Component into the Variables list… but rather what you need is to add it into the COmponent list of the Character directly. essentially that’s not a Component you’ve ATTACHED to the character, but rather a variable that will reference an already existing component. Instead go to the Component List above the variables list and use the green Add button, where you would add a Collision or Mesh component. this will instantiate and attach it to the component hierarchy of your Character. everything else should work the same after that. happy hunting!