Org-5.18a, xemacs "21.4 (patch 21) \"Educational Television\" XEmacs Lucid"

I get the above error when using org-refile.   I think there it just needs
org-file-history defined somewhere.
Maybe
   (defvar org-refile-history nil "Previously used org-refile targets.")


-- 
Jeff Sparkes
jsparkes@gmail.com