I'm making a simple quest mod which requires animations and I got to the point where I need to start implementing those animations. The scene I planned is very simple, so I made it and put it into the game, but I had some issues. The animated object (a sword mesh I made) was randomly disappearing just after its falling motion was completed.

In response, I chose to simplify it even more (with hopes to isolate the problem) and created a new ESP and a new NIF with an animated cube object with a simple box collision (which is just the same object duplicated and assigned as a child of the original). It worked just fine at first, but after a few tries it started to randomly disappear as well, and I've no idea why. Sometimes it plays fine, sometimes it disappears and sometimes it gets pushed high into the sky.

Here is a video of the Animated AnimStatic Cube: watch?v=EscruzgWPAU

The sword and the cube were made, animated and exported with Blender 249B (Blender NIF Scripts v259) as AnimStatic objects set to Stone material and the AnimSequence string value of "Forward". I exported the geometry and animation separately and later attached the KF file to the NIF, as I read somewhere that's how you're supposed to do it. I haven't tried exporting both at the same time.

I'd like to add a link to the files, but I'm not allowed. There's link to them in the OblivionNexusForums and the TESAlliance forums. Maybe someone can take a look and tell me what I'm doing wrong.

Thank you.

Note: the animations always look perfect in NifSkope.