Google nest says:"TRIGGERcmd not registered on Google Home" when it is.

[David Jones]

If I issue "Hey Google, ask TRIGGER c.m.d. to run fred on mumma."
I get a reply TRIGGERcmd not registered on Google Home

But on my phone on Home Control tab TRIGGERcmd Smart Home is listed under Linked Services. It actually says 22 devices. So the Voice Commands->Google Assistant don't work whereas Smart Home Voice Commands->Google Assistant do work.

[Russ]

@david-jones, if you enable the TRIGGERcmd Google Action it should work.

You've only enabled the TRIGGERcmd Smart Home Google Action so far.

I like the Smart Home action better personally because it creates on/off smart home switches for each of your commands, so Google Assistant just has to match your words to one of them when you say turn on X or turn off X. It has a much better chance of matching your words to your commands because it has a list of them ahead of time.