Thank you!! Do you think that you can show me how to fix it? Nothing I try works.
It’s because LevelNumber has two elements, and LevelAdd is taking values higher than 1.
Also, ++ already does the increment. You don’t need that ‘set leveladd node’ 
Where are you looping on LevelAdd?
I fixed it. It was a problem with my timer, but thank you for all the help!!