Waveform Data via CI-V Bus Interface

I have an IC-7300. I want to be able to read the waveform data from the 7300 into my PC using the CI-V interface.

I have successfully exchanged control and status messages over the CI-V interface, but I cannot obtain the waveform data through it. A sniffer tool verifies that the waveform data is being provided from the 7300 to my PC over the USB interface. However, when I send the commands listed in the manual to obtain the waveform data over the CI-V interface, no data is provided.

Can you assist me ? Thank you for the privilege of your time.

Oddly this was discussed just a few days ago.