Go there that's how I fixed it. Basically Sins doesn't let you use more than 2GB of RAM at once, and many mods (and vanilla sins when you want huge games) kinda need more than 2GB, at least from my (limited) understanding.
Should be self-explanatory on how to use it and such just select the application of sins with it in your folder, check the box, save and voila.
Dr.Carter
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