list - getting undefined reference to a function in commonLISP -


i'm trying compile following code:

    (defun nextstates (st)   "generate possible states"   (setf n 0)   (setf states-list (make-list 9))   (setf list-actions (possible-actions))    (loop x in list-actions       (setf aux (nextstate st x))      (when (not(member aux (states-list) :test #'equalp))          (progn             (setf (nth n states-list) aux)             (setf n (+ n 1))          )      )   )      (values states-list)   )

nextstate function , states-list list, both of defined. i'm getting "undefined reference states-list". don't know i'm doing wrong. appreciated

renaming badly camel case lisp case i'm left this. 

(defun next-states (st)   "generate possible states"   (loop :for action :in (possible-actions)         :for aux := (next-state st action) :then (next-state st action)         :when (not (member aux states-list :test #'equalp))           :collect aux :into states-list         :finally (return states-list)))

as test here had:

(defun possible-actions ()   "have duplicates see not member in action"   '(0 1 3 3 4))  (defun next-state (st action)   "simple version test"   (+ st action))  (next-states 3) ; ==> (3 4 6 7)

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