When I load into certain zones, the cell structures, walls floors cieling, will be missing. Some static objects will still be there, some triggers still operate. Its very Hay Wire. If I am to walk over an invisible zone it might restructure, or reappear the cell that was missing. Other times I fall through endless, or fall through to the next level.

However, when I load out of game and load back in. It will most often than not be restored.

Can anyone Assist me???

"I've had the same thing happen to me but only if I used "Sound of Skyrim" without using the "CTD fix" versions of the files. That happens to me if I uninstall and reinstall using NMM and forget to copy the "fix" versions back and run BOSS or manually change the load order. I figure it's one step from a CTD but not quite there. When this happens I don't even see anything in my Papyrus log so it's hard to pin down."

From another post on other forum --- wahts that fix version for uninstall/reinstall with NMM -- because I did that a few times before the crasehs happend so commonly.