Ferret talk - Jun 2009 - Ferret::Index::Index#scan

Hi everyone, I''m having trouble with the Index scan() method. When I  
call it, I receive a ''private method called'' error. Example:

index.scan(''blah'')
-> private method `scan'' called for
#<Ferret::Index::Index:0xb7c15374>
(NoMethodError)

I tried it on the searcher as well:

index.searcher.scan(''blah'')
-> private method `scan'' called for #<Ferret::Search::Searcher: 
0xb7c0161c> (NoMethodError)


scan() docs:
http://ferret.davebalmain.com/api/classes/Ferret/Index/Index.html#M000024

I''m using ferret-0.11.6.

Can anyone offer any suggestions?

Thanks,

Derek