>>> "EA" == Eric Abrahamsen <eric@ericabrahamsen.net> writes:

> Uwe Brauer <oub@mat.ucm.es> writes:
>> Hi
>> 
>> I am reading my emails, via the nnimap backend and sometimes I start
>> thunderbird first, which then first moves unread emails to certain folders
>> using filter rules.
>> 
>> Here comes the question: can I create a gnus virtual group which would
>> display only the unread emails, of the groups I am subscribed to in gnus?

> You should be able to create a persistent nnir search group, where the
> search terms are just "UNSEEN".

Thanks, but it seems not to work.

In the group buffer I first visited a group which contains one unread
message, I left that group and typed outside 

G G
unseen
and received the following *error* message
Debugger entered--Lisp error: (error "Couldn’t request group nnir:nnir-87a764m2w8.fsf: S...")
signal(error ("Couldn’t request group nnir:nnir-87a764m2w8.fsf: S..."))
error("Couldn't request group %s: %s" "nnir:nnir-87a764m2w8.fsf" "Search produced empty results.")
gnus-select-newsgroup("nnir:nnir-87a764m2w8.fsf" t nil)
gnus-summary-read-group-1("nnir:nnir-87a764m2w8.fsf" t t nil nil nil)
gnus-summary-read-group("nnir:nnir-87a764m2w8.fsf" t t nil nil nil nil)
gnus-group-read-group(t t "nnir:nnir-87a764m2w8.fsf" nil)
gnus-group-read-ephemeral-group("nnir-87a764m2w8.fsf" (nnir "nnir") nil nil nil nil ((nnir-specs (nnir-query-spec (query . "unseen")) (nnir-group-spec ("nnimap:UCMgmail" ("nnimap+UCMgmail:Karp"))))))
gnus-group-make-nnir-group(nil)
funcall-interactively(gnus-group-make-nnir-group nil)
call-interactively(gnus-group-make-nnir-group nil nil)
command-execute(gnus-group-make-nnir-group)

My setting is 

(nnimap "UCMgmail"
(nnimap-address "imap.gmail.com")
(nnimap-server-port 993)
;; (nnimap-authinfo-file "~/.authinfo.gpg")
(nnimap-authinfo-file "~/.authinfo")
(nnimap-stream ssl)
;;(nnimap-stream starttls)
(nnimap-fetch-partial-articles t)
(nnir-search-engine imap))


So I am puzzled,

What went wrong?