Need Help with first Mod (Weapon)

[erunesuto2]

So i am creating my first Mod, a weapon.

 

I went through this guide step by step (http://www.nexusmods.com/skyrim/mods/16985/?) and also informed myself with the help of other guides (Youtube etc.).

Instead of Cinema 4D, i use Modo.

 

My problem is this:

 

In CK -

http://s14.directupload.net/images/141030/etoxcera.jpg

 

As you can see, only parts of my weapon are displayed. The rest is invisible.

 

If i open my mesh again with Nifskope (1.1.0-rc6 / 1.1.3.36ebfdd), i get this message,

 

""device position incorrect after block number 16 (NiTriShapeData) at 0x2277b ended at 0x30e6b7 (expected 0x30e563)""

""device position incorrect after block number 17 (BSLightingShaderProperty) at 0x30e563 ended at 0x30e567 (expected 0x30e5c7)""

""device position incorrect after block number 18 (BSShaderTextureSet) at 0x30e5c7 ended at 0x30e5cb (expected 0x30e6af)""

"failed to load file footer"

"failed to load nif from 'D:/Games/SteamLibrary/SteamApps/common/Skyrim/Data/meshes/weapons/kirotvasara/1stpersonkirotvasara.nif'"

and my mesh looks like this -

http://s14.directupload.net/images/141030/temp/zps8gys7.jpg

I do not know what causes this problem.

I checked the normals with Modo AND Cinema 4D. There seem alright.

My texture files are in 2K and my normal map is in 4k, but i don't think that's the problem.

The problem my lie within Nifskope.

Before saving my mesh in Nifskope and opening it in the CK, i can't see any errors. The device positions , as the error message says, are correct and my mesh and textures are also displayed properly.

Then during the saving process something happens...