In another project I am working on, I created 4 active system boxes. Three I never assigned in code to. One I did. It was to jump to Frame 2 when I clicked on the active system box which is on Frame 1. Everything worked fine but I decided to redesign the app and not longer needed the boxes. So I deleted the referring to this one box and started deleting the other three boxes. All three deleted fine except the one that had used the code. Remember, I deleted the code and double-checked no other code was remaining that referred to the active system box. On running the runtime it aborted.
I exited out of my app "without" saving and reloaded the app.
Again I removed the code and the first three boxes.
Problem: I found that as long as I leave the box on frame 1 and do not delete it the runtime works fine. Again, if I delete this box the runtime aborts.