Spam learning individual messages doesn't work (version 2.7.2)

Rick Baartman <[email protected]>
Newsgroups gmane.mail.exmh.user
Message-ID <[email protected]> 
I do not have the bogofilter button selected as "Spam Program", and yet I get

couldn't execute "bogofilter": no such file or directory

when I hit "learn as spam". 

OTOH, if I hit "learn folder as spam", it works normally.
-- 
rick baartman
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