The radio will emit a continuous tone or reboot automatically once the write process is successful. 5. Troubleshooting Common Software Errors Error Message / Issue Likely Cause or "Com Port Unavailable" Software looking at the wrong port, or driver conflict.
: Launch the software and navigate to the preferences or communication settings. Select the motorola gm339 programming software
: If using a USB cable, ensure the virtual COM port drivers (usually FTDI) are updated in your Windows Device Manager. The radio will emit a continuous tone or