Adding another subfield to an externally defined data structure.

 I want to do the following:
     D FLWORKREC       DS                  likerec(flworkr)
     D  col                          15p 4 overlay(flworkrec:39) dim(389)

However, when I try I get:
    36 D FLWORKREC       DS                  likerec(flworkr)  
    37 D  col                          15p 4 overlay(flworkrec:39) 
dim(389) 
======>                  aa                  bbbbbbb  
*RNF3703 20 a      003301  The subfield or parameter definition is not 
specified 
                           within a group.  
*RNF3601 20 b      003301  Keyword is not allowed for a field definition; 
keyword
                           ignored.  

Is this what I need to do:
     D FLWORKREC       DS                  likerec(flworkr)
     D pDuh            s               *   inz(%addr(flworkrec))
     D duh             ds                  based(pDuh)
     D  col                          15p 4 overlay(duh:39) dim(389)

Rob Berendt
-- 
"They that can give up essential liberty to obtain a little temporary 
safety deserve neither liberty nor safety." 
Benjamin Franklin