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Designers have also used single-ended lines successfully for lower speed designs ; modern gigabit designs use differential signaling because of the advantages of noise immunity and reliable current return paths . Note that this assumes that there is a program named X in the current search path . Right-click in the Launch Pad and select Refresh from the context menu to update the Launch Pad so it reflects all products on the current search path . If there are any problems , an error message is printed , which will describe the problem and list the current font path .