Confused by IMAQdx Extract Image

Using LV2015, I have a ring acquisition. It runs fine until the camera stops acquiring. This happens because it has a hardware trigger. When the test ends the camera stops receiving triggers. At that point I want the loop containing IMAQdx Extract Image to finish, but it doesn't. As best I can tell this is because I have that vi set to never time out. 

I need it to never time out because when I start up the program the camera may not be acquiring.

So how do I tell it there are no more images coming and to move on so the loop can close?

 Hopeful this part of the diagram helps.