To start it all off, thanks Steff for the tests. I was not sure what to look for and the mistake didn't really show itself again, so I had nothing consequent to show. However, now it repeats in a weird way - maybe it helps, maybe not.
Following the more common suggestion of doing things, save old ones, Test and THEN continue, I found a new way this error is approaching;
Now, I've again been editing a Blizzard area. Textures have mostly been kept as they are. I only changed height of some parts, etc.
However, after doing some smaller changes, I became unable to go near the area with the same area. Now, from former experiences, I know that fixing doodads or removing doodads (each with the tool) might fix it, so I did - it fixed the issue. Now, the weird part begins. I go from one end of the ADT to another through the whole area and have no problems at all. However, going back along the way shows the same doodad error like before.
Make it short:
- Edited an area (Azeroth_39_34.adt - forbidden sea near Jintha'Alor)
- Added various models which worked, changed landscape, etc. - worked
- Changed some textures on the map - doesn't work.
- Fixing the doodads - works, however...
-- Moving through the adt, but coming to roughly "half" the area, it gives the same wowerror I had until now.
Also, from early tests, changing the detailID didn't have an effect - might have done it wrong, but I did change every detailID value in every chunk to -1.
EDIT:
Do you want me to apply a Bug to the tracker ?