Hi, on page 4 of the AXE027 manual, there was mention on the possibility of an unsuitable COM port assigned (e.g. COM20). What is the criteria for an unsuitable COM port being assigned ? In the the top most diagram on the right of the same page, only COM1 to COM10 were listed. Assuming Step 1 of the same page in the program editor was checked for grey out ports, can we infer that the possible COM port assigned must be between COM 1 to COM 10 so that no reassignment is needed ?