Emptying a ListMagic list, unhiliting a line

[George C Brackett]

How does one empty a ListMagic list (v. 1.1.3)?  I've tried from the  
message box
	LMPopulate  empty, the long id of fld "Staff" of card 1  (also ""  
instead of empty)
and get "Error description: Field: tabstops is not a positive  
integer".  I then tried
	put space & tab & space & cr into tList; LMPopulate tList, the long  
id of fld "Staff" of card 1
and get the same error.

Similarly, I have wanted to unhilite a line by script in a ListMagic  
list, and found no such command.  All I could do was unhilite  
everything by re-populating the list.

Any ideas?
George