THE INITIAL SITUATION

              (gnus-select-newsgroup "nndraft:drafts" t)
                gnus-articles-to-read
              --> Can't select group

    gnus-select-newsgroup called gnus-articles-to-read but it didn't find
    anything. cond statement in gnus-articles-to-read triggered 0, thus
    returning nil back, and hence error message


(defun gnus-select-newsgroup (group &optional read-all select-articles)
    ;; Adjust and set lists of article marks.
    (when info
      (gnus-adjust-marked-articles info))

info --> ("nndraft:drafts" 1 nil nil (nndraft "") ((timestamp 13711 39412) (expiry-wait . 5) (total-expire . t) (gnus-dummy (gnus-draft-mode))))

    (if (setq articles select-articles)
        (setq gnus-newsgroup-unselected
              (gnus-sorted-intersection
               gnus-newsgroup-unreads
               (gnus-sorted-complement gnus-newsgroup-unreads articles)))
      (setq articles (gnus-articles-to-read group read-all)))


    (if (setq articles select-articles)
--> nil 
      (setq articles (gnus-articles-to-read group read-all)))
--> 0

and later the cond statement in gnus-select-newsgroup

     ((eq articles 0) nil)


(defun gnus-articles-to-read (group &optional read-all)
  ;; Find out what articles the user wants to read.
  (let* ((articles
          ;; Select all articles if `read-all' is non-nil, or if there
          ;; are no unread articles.
          (if (or read-all
                  (and (zerop (length gnus-newsgroup-marked))
--> '(19)       
                       (zerop (length gnus-newsgroup-unreads)))
--> nil

        articles
--> nil 


AFTER I PUT (display . all) TO GROUP PARAMETER    


info --> ("nndraft:drafts" 1 ((1 . 133) 135 (137 . 140) (142 . 143) (145 . 155) (157 . 163) (165 . 170)) nil (nndraft "") ((timestamp 13806 46863) (expiry-wait . 5) (total-expire . t) (gnus-dummy (gnus-draft-mode))))