Lowlevel fatal error????

Didn’t’ work…still does it. I am so confused right now. I’ve not worked on this area in months…and now all of a sudden…crashes.

I can’t remake the map either…nor do I have a more recent backup of it…the engine backed it up last 10 days ago…lots happened since then.
all this happens just as the map starts getting more of a following…figures.

I can see the land in the editor…I can see the land IN GAME…but when i get too close…bam…it crashes.