Listowner manual v14.3 (7 Dec 2004), par. 4.9.2 "Passive Probing" describes 
a command:
Auto-Delete= Yes,Full-Auto,Probe(30)

...but on putting the header, LISTSERV® reports an error:
The following problems have been detected in the list header:

* Auto-Delete= ...,YES,...
Error: Invalid parameter value. Choose one from the following (without the
quotes): "Semi-Auto", "Full-Auto", "Manual", "Delay(*)", "Max(*)" or
"%Lite%Probe(*)".

Please refer to the list keyword documentation (available via the "INFO
KEYWORDS" command) for more information about keyword syntax.

Did I misunderstand the manual instruction or what?

Karl