src/HOL/Modelcheck/mucke_oracle.ML

 	 fun qtn (Type(a,tl)) = (a,tl) |
 	 qtn _ = error "unexpected type variable in preprocess_td";
 	 val s =  post_last_dot(fst(qtn a));
 	 fun param_types ((Const("Trueprop",_)) $ (_ $ (Var(_,Type(_,t)))))  = t |
 	 param_types _ = error "malformed induct-theorem in preprocess_td";	
-	 val pl = param_types (concl_of (get_thm sg (s ^ ".induct", NONE)));		
-         val l = split_constrs sg (snd(qtn a)) pl (prems_of (get_thm sg (s ^ ".induct", NONE)));
+	 val pl = param_types (concl_of (get_thm sg (Name (s ^ ".induct"))));		
+         val l = split_constrs sg (snd(qtn a)) pl (prems_of (get_thm sg (Name (s ^ ".induct"))));
 	 val ntl = new_types l;
         in 
         ((a,l) :: (preprocess_td sg (ntl @ b) (a :: done)))
         end)
 end;