If you're playing LE with many mods and have inexplicable CTDs when crossing exterior cells, there's a fix

[xtremeGoose]

During cell transitions, there's a race condition on specific vanilla service quests that use the location alias as a conditional. Apparently grabbing the location alias is not thread safe in LE, hence can return NULL or timeout which in turns causes a CTD. In unmodded LE, the location alias basically always returns before it's used, but in heavy load orders this is not necessarily the case. This is not fixed by USLEEP.

 

About a year ago, Mitradis somehow figured this out and uranreactor uploaded a fix. He has a nice write up on what the issue is and how they fixed it along with the patch:

https://www.nexusmods.com/skyrim/mods/108260?tab=description

 

This should pretty much impact everyone who has a very heavy load order on LE, so if you're pulling your hair out trying to figure out why using a couple mods alone is entirely fine, but causes crashes for you in your actual load order during cell transitions, now you know why.

[donttouchmethere]

I have it in my load order now and it had no negative effect so far ?

[Heroine HoneyCrotch]

1 hour ago, donttouchmethere said:

I have it in my load order now and it had no negative effect so far ?

I got a little over 40 hours of gameplay in a playthrough right now with said mod. Haven't had any ctds in applicable locations,and I do a lot of running... 

 

 

[Grey Cloud]

2 hours ago, xtremeGoose said:

This should pretty much impact everyone who has a very heavy load order on LE,

Must be vanilla related as I've never experienced it. ?‍♂️

[Heroine HoneyCrotch]

12 minutes ago, Grey Cloud said:

as I've never experienced it.

 

Never crashed while running around outside you say?  

 

 

[Grey Cloud]

4 hours ago, Heroine HoneyCrotch said:

Never crashed while running around outside you say?

Very, very rare and usually not reproducible. Last time I got it was down to using a backported mod. That one was reproducible (it was actually two mods by same author - one was Whiterun and the other Windhelm (I think).