COBOL - "STRING" verb available?

Hi guys
 

 A quick question I was wondering whether anyone could confirm...
 

 I'm using the IKFCBL00 COBOL compiler, which I understand is pretty old (well ancient actually 01MAY72!).
 My source code is attempting to use the COBOL 'STRING' verb as in:
        STRING WS-FIRST-NAME OF WS-USER DELIMITED BY SPACE    
       SPACE DELIMITED BY SIZE                               
           INTO WS-FULL-NAME                                 
           ON OVERFLOW                                       
           DISPLAY 'SORRY, YOUR DATA WAS TRUNCATED'          
       END-STRING.                                           

 

 I'm getting compiler errors on this line, including "DELIMITED NOT DEFINED".
 

 Am I right in assuming the STRING verb is not implemented in this MVT COBOL compiler?
 

 Thanks guys
 

 Pete