(I know this is a bit outdated topic, but I want to help everyone who is trying to google solution of this problem)
I'm not sure what really causes this error but I meet it quite often. I run Noggit 1.2SDL (currently I am also testing 1.3SDL), Win 7, WoW 3.3.5a. Anyway it has something to do with textures. Way to fix it is here.:
-> Find out which ADT is giving you errors. Fly in circles around area giving you errors, you need to know which ADT is "broken".
-> Go back to noggit and make sure that every chunk on that "broken" ADT has 4 textures on it. Just click with 0,01 pressure to apply textures where they are missing and you don't want to have them there visible. You can swap textures with texture swapper later whenever you need to paint something new on that chunks.
Thats all. Error should be fixed now
. It happens especially on ADTs with ground effects, btw, but today it happened to me with 1.3SDL on ADT where were only textures without any ground effects on (I didn't place any on that map yet). Strange... Anyway this old solution still worked for me.