SQL0012 - Correlation without Qualification

[Viking]

I'm hoping one of the SQL experts here can help me with something. I have an SQL statement defining a cursor in my RPG program. The SQL statement by itself seems to run fine, but I do see a warning. And when I compile the program, I get the warning SQL0012 "SQL0012: Position 61 Correlation without qualification occurred for column ZB$GNR to table MYACCOUNTS." I did some reading and it seems that I need to qualify something in my subselect at the very end of the statement, but I'm not quite clear on how to do what it wants. Here it is:

       Exec Sql
         declare accounts cursor for
           select ZB$GNR,
                  ZB$STR,
                  ZB$ASC,
                  ZB$CRP,
                  ZB$BCY,
                  ZB$AHB/100,
                  ZB$CCL/100,
                  case
                    when ZB$AHB/100 * 1.2 > 500 then
                       floor((ZB$AHB/100*1.2 + 99)/100)*100
                    else 500
                  end as NewLimit
             from myAccounts
             where ZB$BCY not in ('05','**')
               and ZB$CRP = '21 '
               and ZB$ASC not in ('X','L','N')
               and ZB$AHB > 0
               and 'CRT' not in (ZB$CA1,ZB$CA2,ZB$CA3,ZB$CA4,ZB$CA5,
                                 ZB$CA6,ZB$CA7,ZB$CA8,ZB$CA9)
               and 'BNK' not in (ZB$CA1,ZB$CA2,ZB$CA3,ZB$CA4,ZB$CA5,
                                 ZB$CA6,ZB$CA7,ZB$CA8,ZB$CA9)
               and 'B07' not in (ZB$CA1,ZB$CA2,ZB$CA3,ZB$CA4,ZB$CA5,
                                 ZB$CA6,ZB$CA7,ZB$CA8,ZB$CA9)
               and 'B13' not in (ZB$CA1,ZB$CA2,ZB$CA3,ZB$CA4,ZB$CA5,
                                 ZB$CA6,ZB$CA7,ZB$CA8,ZB$CA9)
               and (Current_Date <= retdate(
                   case when zb$dlc = 1 then 20 else 19 end
                   *1000000 + zb$dly*10000 + zb$dlm*100 + zb$dld) + 7 years
                    or Current_Date <= retdate(
                   case when zb$plc = 1 then 20 else 19 end
                   *1000000 + zb$ply*10000 + zb$plm*100 + zb$pld) + 7 years)
               and ZB$GNR not in (
                   select CLACCT from FCLMAN where CLACCT = ZB$GNR);

That very last piece where I'm getting the error warning is just to make sure I don't select any accounts that are in exception file FCLMAN.

Anyway, I'm hoping somebody here will know what to do.

Thanks in advance.