Screen Mismatch exercise 12

I am getting a Screen Mismatch error in what is a very simple screen.



DATABASE stores_demo  -- set PG_DBPATH=database_name@host_address:tcp_port

SCREEN
{
  Number     Date Placed     PO No.       PO Date        Paid Date
 [f001   ] [f002         ] [f003    ] [f002         ] [f002         ]
}

TABLES
  orders

ATTRIBUTES
  f001 = orders.order_num;
  f002 = orders.order_date;
  f003 = orders.po_num;
  f004 = orders.ship_date;
  f005 = orders.paid_date;

INSTRUCTIONS
  SCREEN RECORD sa_order[5] (orders.order_num THRU orders.paid_date)
|________________________________________________________________^
| Error at line 30, character 66
| Mismatch in screen record


This is the exact code provided in exercise 12 of I4GL by Example.  What is
wrong with this?


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