| Error | Likely Cause | Solution | |-------|--------------|----------| | Communication with radio failed | Wrong COM port, cable driver issue, or radio not powered on | Verify COM port in Device Manager. Reinstall FTDI drivers. | | Codeplug too new for this application | Radio was previously programmed with a newer CPS version | Use the exact or newer version of CPS that matches the codeplug version. | | Invalid frequency | Frequency out of band limits (e.g., 450 MHz on a VHF radio) | Check radio model number (e.g., H25KDC9AA1AN for VHF). | | Checksum error after write | Interruption during programming | Re-write the codeplug. If persistent, the EEPROM may be failing. |
Once the codeplug is on your screen, you can edit the configuration: motorola ht1250 programming