I'm working on a mod that edits Solitude. I want the player to be able to climb over some areas of the wall and go out onto the cliffs.

So I moved the collision boxes backwards (the yellow ones in the pic) and and toggled "F4" to see if there was any collision blocking the way.

There weren't.

But when I go in-game there's still an invisible wall blocking the way..

I also placed the house in a test interior cell to see if there was any collision.. and there wasn't. I could pass through the wall.

But I can't do it at this location in Solitude.

Here's a picture of the area:

http://i197.photobucket.com/albums/aa253/GrandDukeAdense/CantPass_zps09d441cd.jpg

Any idea what is causing this??

I've also got the exact same issue with a small piece of wall near the Temple of the Divines.

I thought it was any issue with a single savegame before, because I loaded a new one and it worked fine.

However, I loaded another save game now, one from the beginning of my Skyrim playthrough which was completely free of mods and DLC. And that savegame still had the same issue with the collision...

What can be causing this?

Edit : Never mind, that wouldn't help; apologies :/

Have you checked the nifs and looked at their collision apparently they can be pretty bad.

Like I said, there is no collision present, I have checked it (as seen in the picture).

And in some of my savegames I can walk over the wall like I should be able to.

It's just that in some saves I can't...

Does anything appear when you toggle collision planes visible in CK?

For testing purposes: Are you playing an unmodded game? Did you already make changes in that area?

I tried it out: When I move the collision plane that is shown in your pic, I may be able to climb over the wall (well somehow), but then I fall into the void as the rocks behind the wall are without collision in my game. In your screenshot it looks as if the rocks behind the wall have collision, which is rather strange ...

Nope. You can also see in the picture that I have collision boxes enabled. But that can't be the issue, because in some of my savegames I can in fact move over the wall like I should. I'm only wondering why in some of my save games, I cannot.

It's a completely vanilla save-game. And the only mod I have active is my own. No DLC active either.

I have placed my own rocks behind the wall to act as climbable cliffside, that is why they have collision.

I can also move over the wall.. but not in all my save-games.. That's why I think it's odd.

You have me stumped too.
Present in some saves and not in others makes me wonder what is going on too.

I have of course tested it several times, and it's always the same savegames that don't work. It's odd