I've come to the conclusion that Immersive Patrols and Immersive Creatures, when combined, do not play well with others, especially mods that make changes to cities, villages, and their surrounding areas.

I somehow got lucky enough to save a game just before a very repeatable crash, one that occurs while walking through The Pale. After hours of experimentation, I've discovered that

? IP + IC and nothing else: no crash

? IP + IC and markarth_plus.esp: crash

? IP + IC + ETAC: crash

? All mods + only IP or only IC: no crash

I got crashes with a few other mods as well but by that point I'd stopped caring which ones were causing them because the combinations are far too great. It's insane that markarth_plus.esp caused problems when it makes changes to a completely different area than where I was having he crash. When IP and IC get together, they seem to form a special and extremely intolerant club.

Anyone else want to share their thoughts on this?

Never had an issue with these two running before, do you have a weak rig? try that enb boost n memory patch stuff.

I'm currently using both and have no issues. Are you using BOSS?