set_global_assignment -name MESSAGE_DISABLE -entity ?

The double quotes I was taking from the the line that Quartus had inserted from the GUI interaction. But correct, it also works without the double quotes.

Also, with experimentation I find that this can be done as a global setting and as an instance setting. So, the real problem is the missing message ID in the manual. It would be quite helpful though if the error message would be saying that, rather than just saying there is an error. That is so unhelpful.

So, another question that develops form this is: What is the difference between making this a global setting vs. an instance setting? Would be nice if the manual was to explain this as well.

Thanks for your support.