Okay, Im trying to make a rotating animation in blender....but annoyingly when i try to rotate it -240 degrees, it instead goes 120 degrees....

I then exported it and tried ot change it via nifskope....where when i entered -240 into the value, it changed it ot 120. I tried doing it in increments, but the moment it got a value larger then -180 degrees it just flipped and when all the back round the other way.

Ive tried all i can think of to stop it changing what the value.....any ideas?

My guess is that 360 - 240 = 120 so it moves it literally, not 'to' that angle.
I have trouble in nifskope myself with rotations. Its always messing with the values I enter.

DaMage, I don't see the problem. I just did what I think you were trying to do and it worked perfectly. For reference, I am using Blender 2.49b, Python 2.6.2, PyFFI 2.1.5, and Blender NifScripts 2.5.5.

I made three Blender files: one with no animation, one with animation Forward, and one with animation Backward. I exported the no animation version with Geometry Only as a .nif, the second with Animation Only as a .kf and Anim Seq Name set to "Forward", and the third with Animation Only as a .kf and Anim Seq Name set to "Backward". For the Forward animation, I used three Rot keyframes at 1, 37, and 75 frames. 1 was at 0 degrees, 2 was at -120 degrees, and 3 was at -240 degrees. Playing the animation in either Blender or NifSkope showed the object rotating counterclockwise from 0 degrees smoothly to -240 degrees. The second animation was just the reverse, starting at -240 degrees and rotation clockwise smoothly to 0 degrees. If necessary, I can post the .nif.

Well thats the annoying thing about tihs problem...it only happens 'sometimes' im yet to figure out the situation when this happens.

For example earlier I made something rotate around in a circle just fine.


EDIT: I found that if i build the animatiopn from scratch i can make the rotate properly.....but if i load in an animation with the skeleton to work from, then the rotation doesnt work..

I encountered the same problem when I was learning how to animate for the Shrieking Bolete. Vanilla skeletons have rotated Bip01 and Bip01 NonAccum. Custom skeletons do not have this problem. The solution is posted here -> http://cs.elderscrolls.com/constwiki/index.php/Talk:Blender/Creating_a_Character_Animation.

Basically, if you are using a vanilla skeleton, rotate/translate the bones as explained in the link before animating and everything will work fine. When doing your own animations, everything should be okay without any fancy transforms.

yep.
lol, add an extra key at say -120.

you key at 0 degree, then move the time slider to another frame, rotate object 360 and add another key. You can guess what will happen.