Help Strange Critical Error

[GLO]

History: FD3DRenderInterface::SetIndexBuffer <- UExtraSkeletalMeshInstance::Render <- USkeletalMeshInstance::Render <- FDynamicActor::Render <- SolidRendering <- RenderLevel <- FLevelSceneNode::Render <- FPlayerSceneNode::Render <- UGameEngine::Draw <- UWindowsViewport::Repaint <- UWindowsClient::Tick <- ClientTick <- UGameEngine::Tick <- UpdateWorld <- MainLoop

 

 

So this error ocurs randomly..

Sometimes on teleport, sometimes on attack, sometimes just staying.

 

As i searched, can be something from Video card...anyway..

These error ocurs after i've added some custom items, but i can't find where is the real problem. From where exactly..

 

 

Any suggest?