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I am trying to use the HDMI component macro on Raspberry Pi 4B to get a display which I can change through a Flowcode generated program.

Looking at the help documentation there is a display component called "Raspberry Pi HDMI" which says "Graphical display component designed to work with the HDMI screen output of the Raspberry Pi"

I do not seem to be able to get this component to display on my Pi 4B HDMI (monitor) screen.

Attached is my simple V8 program which I know is working because I get the LED flash I am expecting.

The odd thing is when I shut down the Pi I can see, for a second, what looks like my display when the desktop clears.

Any help would be much appreciated please.

It's working for me (on HDMI0)
What operating system and version are you using? (on the Raspberry Pi)

I am using the Raspberry Pi OS (32-Bit), when I try 'uname - a' I get 'raspberrypi 5.10.17-v71l+ #1403 SMP Mon Feb 22 11:33:35 GMT 2021 arm v71 GNU/Linux'.

By HDMI0 do you mena HDMI cable plugged into HDMI0, which I have.

Thanks.
I have now confirmed it is not working on the latest Pi OS,
(was OK on my Raspbian Buster)
looks like the goalposts have moved
I will need to investigate further

You will need to change the Raspberry Pi Configuration to "Boot to CLI"
(not "Boot to Desktop")
This is preferable anyway, because the desktop needs to be disabled to use the Flowcode display component.
(It uses the whole screen via the frame buffer)

I understand and that works now