I'm back with some mod testing, and I'm sorry to say that it's probably not very helpful. I tested through, adding mods bit by bit. Eventually, it looked like Verdant - A Skyrim Grass Plugin, was the issue. Adding that in by itself made it stop, and reverting that made it work. To confirm, I re-enabled it and tried again, and it completely worked, with the same exact setup that made it hang prior. :/ I've tested some more setups, and it looks like there isn't a specific mod causing the issue. It looks like the more mods I have enabled, the higher and higher chance of hanging the program gets. It can work or not work with the exact same setup. With enough mods enabled, it hangs every time. I'm not quite technical enough to know what kinds of mods are actually making the difference here (though graphics mods seem to be making a bigger impact, this is far from scientific). I can just tell that it's more consistently working with less mods added, and hanging once I have more than a few enabled. Edit: Is it possible this is an issue of a user's computer simply not being able to handle it, with a lot of mods hanging around? The Task Manager says I'm maxing out my CPU while DynDOLOD is doing its thing. For what it's worth, I was able to work around this prior to having many mods installed by running only some worlds, enabling it, then running the rest and merging per instructions in other threads. I tried to replicate this method with a full load order but it no longer works, as DynDOLOD throws up an error when running the second time. I'm trying to figure that particular bit out myself, at the moment.