I downloaded this code sample and integrated it into my game http://xbox.create.msdn.com/en-US/education/catalog/sample/mesh_instancing
It works with the model that they supplied, but throws and exception whenever I use one of my models.
The current vertex declaration does not include all the elements required by the current vertex shader. TextureCoordinate0 is missing.
I tried pluging my model into their original source code and same thing. My model is an fbx from blender and has a texture. This is the function that throws the error
GraphicsDevice.DrawInstancedPrimitives( PrimitiveType.TriangleList, 0, 0, meshPart.NumVertices, meshPart.StartIndex, meshPart.PrimitiveCount, instances.Length );