I modeled and textured a model; But when I try exporting it into a NIF I get the following: Error: "TEXTURE "Tex" Must be of type IMAGE or ENVMAP" Now, I did scan the internet for possible solutions, unfortunately I didn't find any working ones.
So, frustrated, I decided to Completely erase any trace of texturing on the model and I still get the error. I do not understand what the hell is causing this but It really is making me frustrated.

I have never in my life, encountered this issue before, and the way I texture and model has worked every other time without errors, and yet randomly this happens and I did nothing different.

http://s70.photobucket.com/albums/i109/Slartibartfast_2006/?action=view¤t=ScreenShot010.jpg

I did way before the error happened, then after the error, I re-textured it, and set it like that again. And the error still shows.