| Error | Likely Fix | |-------|-------------| | “Communication Error” | Check COM port, cable driver, radio ON | | “Radio Not Responding” | Use a genuine OPC-478 cable; clones often fail | | “Runtime Error” | Run software in Windows 7 compatibility mode | | “Model Mismatch” | Ensure you have CS-F3003, not CS-F1003 or F2003 |