Open the Rtutil 560 Control Panel from the Start Menu. Under "Port Settings", ensure the COM port is between 1 and 16. If it is higher, change it manually in Device Manager → Ports → Properties → Port Settings → Advanced → COM Port Number.
Renesas has moved most legacy tools to an authenticated support portal. However, the Internet Archive's Wayback Machine retains a verified snapshot of the last stable release. Rtutil 560 Software Fixed Download
Users often search for "fixed" downloads when encountering errors like rtutils.dll bad image or compatibility issues with newer Windows versions. Open the Rtutil 560 Control Panel from the Start Menu
: Typically runs on Windows environments (Windows 7 through Windows 10). Download - Software and applications - ABB Rtutil 560 Software Fixed Download