Hello,

org-ol-tree has a great feature prefix to narrow to buffer. But when you save or open the org-ol-tree in narrow state, it throws an error (treemacs related). It should probably widen on refresh/build actions and possibly narrow it back on the buffer. My lisp is limited but I found this:

(defun narrow-p ()
  "Return t if a buffer is narrowed"
   (not (equal (- (point-max) (point-min)) (buffer-size))))

and adding this to org-ol-tree ()

(if (narrow-p)
      (widen))

Another option might also be to add an org-hook to widen the buffer prior to saving it, and narrow it later. What do you think?