*Backtrace*.txt

Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  get-file-buffer(nil)
  org-find-base-buffer-visiting(nil)
  org-get-agenda-file-buffer(nil)
  org-refile-get-targets(nil (#("humility" 0 8 (fontified t line-prefix #("**" 0 2 (face org-hide)) wrap-prefix #("***** " 0 2 (face org-indent) 2 6 (face org-indent)) face org-level-3))))
  org-refile-get-location("Refile subtree \"humility\" to" nil nil nil)
  org-refile()
  (if (region-active-p) (call-interactively (quote jay-refile-region)) (org-refile))
  refile-region-or-subtree()
  call-interactively(refile-region-or-subtree nil nil)
  command-execute(refile-region-or-subtree)