I am trying to programme PMR446 frequencies to a Puxing PX777 using CHIRP daily build 20200213 and receiving this error message: "Error setting memory: Frequency requires 6.25KHz step".

I can see the 6.25 support is missing from the driver file in the source but 6.25 steps are supported by the radio. I was able to edit the img file to add the correct frequencies and upload to the radio.

Mark Eisner