| Error Message | Cause | Solution | | :--- | :--- | :--- | | | Wrong COM port or bad cable/RIB | Check Device Manager. Try a different USB port. Reboot radio. | | Error #1302: Codeplug version too new | Radio has newer firmware than CPS R05.16 supports | You need a newer CPS version (e.g., R06.12). Downgrade radio firmware (risky). | | Runtime Error 339: MSCOMCTL.OCX missing | Missing Visual Basic component | Download MSCOMCTL.OCX , place in C:\Windows\SysWOW64\ , run regsvr32 mscomctl.ocx as admin. | | No COM port available | Windows 10 removed legacy COM support | Enable "Legacy Plug and Play" via Device Manager > Ports > Add Legacy Hardware. | | Checksum error when writing | Dirty radio contacts or intermittent cable | Clean radio side connector with isopropyl alcohol. Use shorter USB cable. |
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