Starts crashing after a couple of hours

I'm having a similar problem with 0.65. I try to enter the cell with the ebony mine by caldera, and right when it changes cells it crashes every single time. It was working pretty well before. I had maybe 3 crashes in 6 hours. The only other mods I have are character overhaul with blockhead. 

After a little digging around, I found that people recommend using the purge cell buffer mod. I got that mod, and the problem stopped. I used the one that purges every load rather than every cell change. I think I had to do something like that last time I played years ago. Why not make that mod a requirement on the install page?

The random crashes are on the known issues list.

They happen on cell changes, at least for me. Examples are south of Seyda Neen or northwest of Pelagiad. It doesn't help to restart the game. The crash will happen at the same spot again. If you move to a spot shortly before it crashes, save the game. Then open the console and enter the command "pcb" (purge cell buffers). That will allow you to move forward without crashing the game.

You can use a mod that purges cell buffers automatically, but it's not guaranteed to completely fix the crashing.

These OBSE Plugins are extremely helpful, I recommend using them

• EngineBugFixes
• Oblivion Display Tweak
• SkyBSA

Also here is the new version of OBSE

• xOBSE

When you experience a crash, MessageLogger can generate a text document. Useful for reporting..

• MessageLogger

Nothing will completely stop the crashes. Actually the game crashes quite frequently in certain areas of Morrowind (Bitter Coast, Ashlands, Sheogorath). There is an old thread in this forum that handles this topic. It seems that the game ran 100 percent stable before the spawn points were added to the map. This would explain to a certain extend why the crashes always happen when changing cells. I guess we'd have to remove at least 50 percent of the spawn points from the map to get a proper level of stability.

As this is unlikely to happen, it's save, save, save and purge cell buffers frequently. Currently my purger script purges every 5 cell changes or 300 seconds, whichever comes first. Still there are crashes when changing cells.

It's a shame that we have to play like this, considering that the game runs pretty stable in the Oblivion world space and the interior cells.

Well, I don't know where you are currently questing, but I got sick of the crashes when I was exploring the area east of Gnisis and also the region around Ald'ruhn. The game was crashing every few seconds.

So I opened Morrowind_ob.esm in Tes4Edit and couldn't believe my eyes. The creature spawns are sprinkled across the map like icing sugar. It's no surprise that the crappy Oblivion code chokes to death on this. It took me several hours to remove 20 to 50 percent of the spawns from each list, so there is at least one cell space in between each spawn point. Because of overlapping entries in each list there is still a huge amount of spawn points left, but not that insane amount that was there in the beginning. Creatures were basically piling up on top of each other.

Unfortunately there was no immediate effect, because there were still thousands of creatures present in my savegame, but once I kill them I can move freely around the map without the game crashing every few steps in certain places. It's best to start a new game with the reduced spawns and I guess I could still remove 20 percent more and the game would still feel crowded enough. As I'm too far in the game, I won't restart, but I wanted to share my experience, in case someone wants to walk the same road and update the mod. From my experience a drastic removal of spawn points is the only way to get rid of (most) CTDs.

Bullfrog

Well, I don't know where you are currently questing, but I got sick of the crashes when I was exploring the area east of Gnisis and also the region around Ald'ruhn. The game was crashing every few seconds.

So I opened Morrowind_ob.esm in Tes4Edit and couldn't believe my eyes. The creature spawns are sprinkled across the map like icing sugar. It's no surprise that the crappy Oblivion code chokes to death on this. It took me several hours to remove 20 to 50 percent of the spawns from each list, so there is at least one cell space in between each spawn point. Because of overlapping entries in each list there is still a huge amount of spawn points left, but not that insane amount that was there in the beginning. Creatures were basically piling up on top of each other.

Unfortunately there was no immediate effect, because there were still thousands of creatures present in my savegame, but once I kill them I can move freely around the map without the game crashing every few steps in certain places. It's best to start a new game with the reduced spawns and I guess I could still remove 20 percent more and the game would still feel crowded enough. As I'm too far in the game, I won't restart, but I wanted to share my experience, in case someone wants to walk the same road and update the mod. From my experience a drastic removal of spawn points is the only way to get rid of (most) CTDs.

Very Interesting, observation.. the latest master file v2020.10.10 I went around and fixed atleast 100+ Spawn Points since some were so high off the ground or clipping below and I noticed less stuttering.

Unfortunately I can't use the new master file now, because that would probably revert all my changes and I don't want to go through all the lists again.

I have finished the propylon quest already, so in general it is working. If "pcb" isn't working, you can try to come back later and see if you can access the area. I had an unavoidable crash once in Ald'ruhn. Whenever I tried to enter the "Ald Scar Inn", the game crashed. I tried it at a later time and could enter without problems.

Thank you for this!  The 'pcb' console command seems to have worked for me, at least in the most recent CTD problem I've had.