Why does this script work for parts and not for models?

while true do
time = .05
a = 10
i = script.Parent
i.Position = Vector3.new(399.3, 1390.5, -1837.25)
wait(time)
i.Position = i.Position + Vector3.new(0,0,a)
wait(time)
i.Position = i.Position + Vector3.new(0,0,a)
wait(time)
i.Position = i.Position + Vector3.new(0,0,a)
wait(1)
end 

Hi Akozta, I think the problems you are experiencing are because a Model cannot be assigned a position. You can see this if you click on a model and view the properties. You will notice there is no Position field. If you add a part to your Workspace and repeat the same steps you will see there is a Position field, thus meaning you can tell a part what their position should be but not a Model.

If you need to move multiple parts at the same time try this:

• Ungroup your model.
• Select all parts
• Click "Model" tab and click "Union" This will allow all the parts in your model to act as one Part. If this does not work you can undo the Union by clicking it and click "Separate"

There are other ways of moving multiple parts but my response is already getting kind of lengthy.

Let me know if you need anymore help or have any questions.

Cheers, WindNT :D