RPGLE SQ:L retrieving Identity Column for DSPF

I create a file:

        // Create STATESP File
        exec sql
          create table MARTIN/STATESP (
            ID_COL for unique numeric (6, 0)
              generated always as identity
              (start with 1, increment by 1, no cycle),
            STATE char(13) not null,
            CITY char(13) not null);

Then I write a DSPF:
*****************************************************************
                R SFL1                      SFL
                  S1ID_COL  R           5  3REFFLD(ID_COL STATESP)

And the compile fails with ID_COL not defined so I did DSPFFD and see the field's name is UNIQUE and tried that, but that failed too.  (IT does find STATE & CITY so it's field related.)

Which leads me to conclude there is more to this so I start looking around and don't recognize anything that helps me.  My current concern is that I best figure this out so I don't confuse the RRN's value with the Identity Column value.