I don't understand why this isn't working. The code intended needs to print all four items in a list, and is supposed to stop at 4, because that's the length of the second list. However, the error message says that there's nothing at index 5?
You are incrementing listCheck by one at the start, rather than the end. Move those blocks to the bottom of the while loop (whilst still remaining inside the loop) and it should be fine.
Are you running a similar while loop elsewhere in the app? Perhaps that might be causing it.
I'm not, this is the only loop I'm using.
A small favor: could you please upload the .aia file of your project here?
I am genuinely confused. My logic should be soundproof. When I re-arranged a few things, the app just started crashing. Perhaps something is wrong with your .aia file itself.
My app was crashing because my phone was on 2% 
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Eliminate the space in Computer Scientist to something like Computer_Scientist and your app will work. 
Your app thinks there are 5 items in your list while there really are only 4.
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