I got a screenshot you can look at. I am trying to create a point and click like Myst. When I run the program, I will click to move forward and around and it’s fine, and when I click the back button, I can retreat, but for some reason I cannot go back to the very first camera. It’s just blocked. There is a bug called “Accessed none trying to read property call func array get camera item”. So how do we solve this?
Do a check if Cam Array length > 1 before you remove the index to keep the first camera .
I already had camera length >1 before removing index. This was before I posted the question. There’s still a bug there. 
In that case try promoting the length of the array to a local variable before the removal of the index and plug that variable into the remove index integer.
It could be that you need to cache it or else the two nodes executing will interfere with the results.
Nevermind I deleted the blueprint and started everything over and followed a video tutorial. All fixed! Thank you.