Something is preventing me from entering the well, I have tried disabling mods that directly or indirectly modify Whiterun like Whiterun trees and house markers. Still couldn't open the well.

Originally posted by greyeagle:

Something is preventing me from entering the well, I have tried disabling mods that directly or indirectly modify Whiterun like Whiterun trees and house markers. Still couldn't open the well.

Well if it isn't SMIM, I am going to have to dig a lot deeper into conflicting mods. I will do another round up of most common mods and see if I can identify more conflicting mods.

Okay, my bad. I checked again and I did have SMIM installed. I'll deactivate it and try again.

Okay, that was it. I uninstalled SMIM and the mod worked fine. Sorry to get you concerned. I really can't remember installing SMIM as it was probably a very long time ago.

Originally posted by greyeagle:

Okay, that was it. I uninstalled SMIM and the mod worked fine. Sorry to get you concerned. I really can't remember installing SMIM as it was probably a very long time ago.

No worries. I am just glad you got it to work

I can´t find the book. I checked the position and all High Hrotgar

Originally posted by Matician:

I can´t find the book. I checked the position and all High Hrotgar

So far the only people who have had this issue, hadn't activated Dragon Under Whiterun in their Data Files. If you have and are still having this issue, I will have to investigate other solutions. My first guess would be a mod that changes High Hrothgar is some way.

Dragon Under Whiterun caused CTDs whenever I got near the Whiterun gates. I don't know for sure but I assume Open Cities had something to do with it. Anyways, can't use this mod.

I found the book but it will not Start the quest. I am playing skyrim SE. The mod is active.

It was SMIM for me. Running with nothing but SMIM, this mod, and Alternate Start (for easier testing), I still couldn't get into the well.

Specifically, it appears to be SMIM's barrel01 mesh (meshes/clutter/barrel01.nif). I did a binary search with the SMIM files, and a copy of SMIM with every file active except that one works fine, but activating that one file causes the well entry problem.

I don't know why, but that's the result I'm getting.

Okay, I think I fixed the SMIM conflict.

The reason this happens is that the doors to enter and exit the well both use the vanilla barrel mesh. (I'm not sure why, but they do.) SMIM changes the vanilla barrel mesh in a way that seems to be incompatible with the way Dragon Under Whiterun uses it. I don't know why that's the case, but it is.

To fix it, you need to extract a copy of the vanilla barrel01 mesh from Skyrim - Meshes.bsa (meshes/clutter/barrel01.nif) and rename it to something else. (I called mine barrel01duw.nif.) Put that in meshes/clutter, either in the mod folder for Dragon Under Whiterun if you're using Mod Organizer, or the Skyrim Data directory if you're not.

Then you need to open DragonUnderWhiterun.esp in Tes5Edit. Expand the ESP on the left, then open the Door section. Open each of the two Door entries in turn and change the MODL - Model Filename to point to your renamed mesh. Then close Tes5Edit, save the ESP, and you should be good to go.