First, the mod list: Active Mod Files:
Spoiler
00 Oblivion.esm01 Francesco's Leveled Creatures-Items Mod.esm [Version 4.5bSI]02 Francesco's Optional New Items Add-On.esm [Version 4.5bSI]03 Cobl Main.esm [Version 1.73]04 Oscuro's_Oblivion_Overhaul.esm [Version 1.34]05 Mart's Monster Mod.esm [Version 3.7b3p3]06 TamrielTravellers.esm [Version 1.39c]07 FCOM_Convergence.esm [Version 0.9.9MB3]08 Better Cities Resources.esm [Version 5.0.7]09 DLCShiveringIsles.esp0A Better Cities .esp [Version 4.7.0]0B Francesco's Optional Chance of Stronger Bosses.esp0C Francesco's Optional Chance of Stronger Enemies.esp0D Francesco's Optional Chance of More Enemies.esp0E Francesco's Optional Leveled Quests-SI only.esp0F Francesco's Optional Leveled Guards.esp++ FCOM_Francescos.esp [Version 0.9.9]++ FCOM_FrancescosItemsAddOn.esp [Version 0.9.9]10 FCOM_FrancescosNamedBosses.esp [Version 0.9.9]11 KDCircletsOOOOptimized - NPC Equip.esp [Version 1.2]++ FCOM_KDCircletsOOOOptimizedNPCEquip.esp [Version 0.9.9]++ MMM_Runeskull_Rebalance_BETA2.esp [Version Beta]12 Cobl Glue.esp [Version 1.73]13 Cobl Si.esp [Version 1.63]14 Bob's Armory Oblivion.esp15 FCOM_BobsArmory.esp [Version 0.9.9]16 Oblivion WarCry EV.esp [Version 1.09]17 FCOM_WarCry.esp [Version 0.9.9MB5]18 Oscuro's_Oblivion_Overhaul.esp [Version 1.34]++ OOO-Water_Weeds.esp [Version 1.33]19 OOO 1.32-Cobl.esp [Version 1.72]1A FCOM_Convergence.esp [Version 0.9.9Mb3]++ FCOM_EntropicOrderhardcoe.esp [Version 0.9.9]1B FCOM_RealSwords.esp [Version 0.9.9]1C FCOM_DurabilityAndDamage.esp [Version 0.9.9]++ FCOM_SaferRoads.esp [Version 0.9.9]1D Mart's Monster Mod - Extra Wounding.esp [Version 3.7b3p3]++ Mart's Monster Mod - Looting NPCs & Creatures.esp [Version 3.7b3p3]++ Mart's Monster Mod - Less Bone Loot.esp [Version 3.7b3p3]1E Mart's Monster Mod - Safer Quest Locations.esp [Version 3.7b3p3]1F Mart's Monster Mod - Hunting & Crafting.esp [Version 3.7b3p3]20 Mart's Monster Mod - Farm Animals.esp [Version 3.7b3p3]21 Mart's Monster Mod - Diverse WaterLife.esp [Version 3.7b3p3f]++ Mart's Monster Mod - Slof Horses Complete.esp [Version 3.7b3p3]++ Mart's Monster Mod - Diverse Runeskulls Loot OOO.esp [Version 3.7b3p3]22 TamrielTravellersItemsCobl.esp [Version 1.39c]++ FCOM_TamrielTravelers.esp [Version 0.9.9]++ FCOM_DiverseGuardUnity.esp [Version 0.9.9]++ FCOM_HungersUnitySI.esp [Version 0.9.9]23 FCOM_MoreRandomSpawns.esp [Version 0.9.9]24 FCOM_MoreRandomItems.esp [Version 0.9.9]++ Mart's Monster Mod - Shivering Isles.esp [Version 3.7b3p3]++ MMM-Cobl.esp [Version 1.73]25 Better Cities - House price patch.esp [Version 1.0]26 Alternative Start by Robert Evrae.esp++ Item interchange - Placement for FCOM.esp [Version 0.76]27 Better Cities Full.esp [Version 5.0.7]28 Better Cities - VWD of the IC.esp [Version 4.7.0]29 Better Imperial City.esp [Version 5.0.0]2A Better Cities - Unique Landscape Chorrol Hinterland.esp [Version 4.8.4]2B Better Cities - Unique Landscape Skingrad Outskirts.esp [Version 5.1.0]2C Better Cities - COBL.esp [Version 2.1]2D Bashed Patch, Ranger.esp
Also: ConScribe, Universal Silent Voice, FastExit, Pluggy and MenuQue. Was using OSR, disabled it because I couldn't get any other Heap Setting than 2 to work without Oblivion refusing to load.
When starting a new game and going to the Imperial City using Alternate Start Arrive By Ship, I'm getting a consistent CTD in the waterfront tunnel. I can run over to it, run up the incline, and get all the way up to the top, but when I reach the flat area at the top it crashes every time.
However, sometimes if I save outside the tunnel, quit Oblivion, restart it, reload the save, and run up, it doesn't crash. If I save just inside the tunnel door, quit Oblivion,restart, and reload, it never crashes.
If I go straight to the Temple District (via coc ICTempleDistrictAlgotsHouse), and run down the tunnel towards the Waterfront, there is no crash. However, if I try to re-enter the tunnel from the Waterfront side after exiting, I get a CTD every time.
Without FCOM, I can go through the tunnel just fine. Obviously, I can't test it without BC because then the tunnel wouldn't exist.
Not entirely sure what the problem is (though when it crashes when I can see the inside of the tunnel, there does seem to be a lot of NPCs all in the same spot--around a dozen clustered up), so any test I've missed or any advice would be appreciated.