OP code in RPGIII called 'FREE'

We have an old program with a statement 'FREE....' . According to the help,
it 'deactivates a program'. Does anyone know if there is another opcode that
I can use to substitute for 'FREE' or maybe it is no longer necessary and
that is why it is not valid in RPGLE. The program does handle a interactive
menuing system and probably there are many CALLS to it at the same time and
maybe this is a way of 'freeing' an 'instance' of the program that is not
necessary any more. I'm reaching here so there is great possibility that I
don't know what I'm talking about.  

Below is the portion of code with the statement about 2/3rd's down. Thanks
in advance.
   
 C                     MOVE *ZEROS    ERRSEV                        
 C                     CALL PROGNO                 62               
 C*                                                                 
 C*  TEST FOR NORMAL TERMINATION OF CALLED PROGRAM. IF INDICATOR 62 
 C*  IS ON, THE PROGRAM WAS EITHER NOT FOUND OR THE CALL ENDED AB-  
 C*  NORMALLY IN SOME OTHER WAY. SET ERROR FLAG ACCORDINGLY.        
 C*                                                                 
 C           *IN62     IFEQ ON                                      
 C           PROGST    IFEQ NOPROG                                  
 C                     MOVE ON        ERR04                         
 C                     ELSE                                         
 C                     MOVE ON        ERR03                         
 C                     END                                          
 C                     ELSE 
 C*                                                                
 C*  IF INDICATOR 62 IS NOT ON, CHECK TO SEE IF ANY OTHER PROGRAM  
 C*  ERRORS WERE DETECTED. IF SO, MOVE THE RECEIVED ERROR MESSAGE  
 C*  TO THE SCREEN ERROR MESSAGE FIELD. IF NOT, CLEAR THE OPTION   
 C*  FIELD.                                                        
 C*

 C*                                                      
 C                     FREE PROGNO                 62    
 C           ERRSEV    IFEQ ONE                          
 C                     MOVE ON        *IN69              
 C                     MOVELERRMSG    SCERMS             
 C                     ELSE                              
 C                     MOVE *ZEROS    SCOPTN             
 C                     END                               
 C                     END                               
 C*                                                      


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