mu4e doesn't use this function, so something else must have - and this
something is somehow expecting gnus to have been loaded (which would
define the function).
Try to get an emacs backtrace from this error, and/or grep your settings
/ 3rd party packages for this function to see who's the culprit. As a
q&d fix, you could of course load gnus before mu4e...
Cheers,
Dirk.
--
Dirk-Jan C. Binnema Helsinki, Finland
e:dj...@djcbsoftware.nl w:
www.djcbsoftware.nl
pgp: D09C E664 897D 7D39 5047 A178 E96A C7A1 017D DA3C