src/HOL/Tools/BNF/bnf_fp_n2m.ML

         xtor_rel_thms = of_fp_res #xtor_rel_thms (*too general types and terms*),
         xtor_co_rec_thms = xtor_co_rec_thms,
         xtor_co_rec_o_maps = fp_rec_o_maps (*theorems about old constants*),
         xtor_rel_co_induct = xtor_rel_co_induct,
         dtor_set_inducts = [],
-        xtor_co_rec_transfer_thms = []}
+        xtor_co_rec_transfers = []}
        |> morph_fp_result (Morphism.term_morphism "BNF" (singleton (Variable.polymorphic lthy))));
   in
     (fp_res, lthy)
   end;