# Missing Files

Make sure that the correct path to the firmware files is shown in the Local folder for firmware files.

Click Copy new files from Elecraft.

The required files are:

- An MCU firmware file, "hmcuNNNN.hex", where "NNNN" is the revision number.
- Beginning with MCU revision 04.62, there may be two MCU firmware files for two different K3 front panel LCD controllers. The K3 Utility selects the appropriate file automatically using a response from the K3's permanent factory-installed firmware. The firmware folder may contain both hmcuNNNNa.hex and hmcuNNNNb.hex files. Both should be present in the Local folder for firmware files.
- An FPF (Front Panel Flash memory) firmware file, "hfpfNNNN.hex", where "NNNN" is the revision number.
- A DSP boot loader file, "tbootN.hex", where "N" is the revision number.
- A main DSP firmware code file, "hdspNNNN.hex", where "NNNN" is the revision number.
- A DSP firmware data table file, "dtblNNNN.hex" where "NNNN" is the revision number.

The following file is required if you have enabled the KRX3 Second Receiver Option:

- A second receiver DSP firmware code file, "hauxNNNN.hex", where "NNNN" is the revision number.

The KDVR3 Digital Voice Recorder comes with factory-installed firmware. There is no firmware file for the KDVR3.

"hfwnotes.rtf" is required for the K3 Firmware Release Notes Help menu item.

"K3UtilityVersionInfo.txt" is used to determine if the installed K3 Utility revision is current.