???

What the hell is that supposed to mean? By the way, I'm using ahobo.

Usually it's a result of the animation graphs or the collision geometry not matching up to the gbxmodel.

That explains it. Well, it's the hornet tags I downloaded, and unfortunately, there's a problem in the animation graph. I decided to give it the Banshee anims, then I got that problem.

Well, see, what happens when you do that, is that the animation graph has data about markers and nodes for the banshee, and in the graph it tells the game what parts to move, and where to move them, and when, and if your hornet doesn't have the exact same nodes, all linked exactly the same, then the animation graph is going to be telling nodes to move somewhere and the nodes aren't really even in existence. If that makes any sense at all :P
Example time!

animation graph has a node "frame cover"
in the enter animation, the node "frame cover" is rotated 45 degrees

So, the animation graph is going to look for a node called "frame cover" on your hornet, and if it's not there, then that causes a problem. The same is true for all other nodes included in the animation graph. The simplest solution would be to get the hornet model into max, and link the entire hornet model to the parent node (the frame everything else is linked to) and then re-export. If you import it into max using the gbxmodel exporter, chances are you'll have to re-set up the materials though, which can be a pain in the ass.

You didn't really need to explain. That was, technically, my description of the animation; the models you use when you animate are almost completely worthless regarding the output, so the animation pretty much completely depends on how, when, and where the nodes and markers move.

what about the checksum?

as far as I know, that won't work if the nodes are completely different.
Although you could try that also. To do that, open your model_animation tag, scroll all the way down, find "node checksum list" copy that value
open your gbxmodel
find "node checksum list"
paste that value into there
save

you need kornmanv102 or higher for this I believe, since it's greyed out in normal guerilla.

Thanks from me. I was having the same problem, actually.