In order to expedite the models that I've been working with, I've been attempting to use an iterator in ModelBuilder so fewer file name changes in the model process (the main time consumer) are necessary. However, whenever the model process reaches the iterator itself, the program crashes. I've tried using systems with more processing power, but that doesn't fix the issue. Anyone have any idea what the issue might be? I can't find much out there on this topic, so I'm not sure what the problem itself might be. Would prefer a solution that involves adjusting the model itself rather than a Python-based solution, since most of our processes are run through ModelBuilder. I've attached a screenshot of the model. I'm using ArcGIS 10.4.
EDIT: I have attached the Python code output to help in diagnosing the issue.