[DustyPorViva]

If fixing your tiledefs didn't work(which you said you had done), then I have no clue what is wrong.

Any problem related to tiledefs is usually fixed by deleting them and restarting Graal. Of course, this is assuming you're not opening the same level with perhaps the same bad addtiledef in it. If deleting your tiledefs is not the problem, then it's nothing related to addtiledef. To be sure though, delete ALL the folders in your tiledefs folder, even online server tiledefs.