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Ok, so for the sake of learning, I will go over with you every step in the process of debugging an issue like this. If I lose you anywhere, feel free to ask me to clarify:
We know there are 3 index...

You have a lot of loops going on.
The exception is thrown on line 130 of the arrayObjects class (according to your stack trace). What is on that line?
I don't know if you are doing this or not, but...