
(/VERSIONCHECK 2) 

(DEFPARAMETER |StepThrough;AL| 'NIL) 

(DEFUN |StepThrough| ()
  (LET (#:G5103)
    (COND (|StepThrough;AL|) (T (SETQ |StepThrough;AL| (|StepThrough;|)))))) 

(DEFUN |StepThrough;| ()
  (PROG (#1=#:G5101)
    (RETURN
     (PROG1
         (LETT #1#
               (|Join| (|SetCategory|)
                       (|mkCategory| '|domain|
                                     '(((|init| ($) |constant|) T)
                                       ((|nextItem| ((|Union| $ "failed") $))
                                        T))
                                     NIL 'NIL NIL))
               |StepThrough|)
       (SETELT #1# 0 '(|StepThrough|)))))) 

(MAKEPROP '|StepThrough| 'NILADIC T) 
