StopGUI:

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   GUI for stopping scripts. Has Pause, Stop, and Plot buttons.
   See ShuttleSim for an example.

   Typing StopGUI is the same as StopGUI('Stopping GUI')
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   Form:
   StopGUI( name )
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   Inputs
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   name	(1,:) GUI name      

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   Outputs
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   None       

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