Blender Error Message Help? (Fallout 3/NV)

[plasmagamer2137]

Hello,

 

I am interested in making reload animations for fallout NV. Ive tried this before so I know bit about the software. When I try to load in a weapon mesh python script error appears and nothing loads in.

 

 

Blender NIF Scripts 2.5.9 (running on Blender 249, PyFFI 2.1.11)
Dependency cycle detected:
Rig depends on Scene Root.001 through Parent.
Scene Root.001 depends on Rig through Copy Rotation.

Traceback (most recent call last):
File "C:\Apps\Blender\.blender\scripts\bpymodules\nif_common.py", line 1235, in gui_button_event
self.gui_exit()
File "C:\Apps\Blender\.blender\scripts\bpymodules\nif_common.py", line 1598, in gui_exit
self.callback(**self.config)
File "C:\Apps\Blender\.blender\scripts\import\import_nif.py", line 3771, in config_callback
importer = NifImport(**config)
File "C:\Apps\Blender\.blender\scripts\import\import_nif.py", line 170, in __init__
data.inspect(niffile)
File "C:\Python26\lib\site-packages\pyffi\formats\nif\__init__.py", line 1285, in inspect
self.inspect_version_only(stream)
File "C:\Python26\lib\site-packages\pyffi\formats\nif\__init__.py", line 1195, in inspect_version_only
raise ValueError("Not a nif file.")
ValueError: Not a nif file.

When I did this for first time the weapon mesh I loaded in was .rar and seemed to load fine and only loaded the mesh. Now I doesn't load anything.