A method of gracefully shutting down a mobile device in operational relationship with one or more active components is provided. The pumping unit includes a passage extending to a suction end of the pumping unit. A robotic transaction playback client records the various steps in a particular transaction and can repetitively execute these steps to analyze the results. If no new or changed portion of code has executed, the restricted action is allowed to an extent determined previously for the prior version of the executable file.