Does the analytical function "RANK" work in Oracle Forms

I have the following sql declared in a cursor.  The SQL runs fine in toad if I populate the variables but it won't compile in forms...

  CURSOR cAssetData (pRank IN NUMBER) IS
  SELECT asset_class_code,
         product_id,
         payment_method_code,
         model_code,
         manufacturer_code,
         year_of_manufacture,
         serial_number,
         location_code,
         asset_location_notes,
         asset_status_code
  FROM   (
         SELECT nvl(a.asset_class_code,'METER') asset_class_code,
            a.product_id,
            a.payment_method_code,
            a.model_code,
            a.manufacturer_code,
            a.year_of_manufacture,
            a.serial_number,
            lpad(a.location_code,2,0) location_code,
            a.asset_location_notes,
            nvl(a.asset_status_code,'LI') asset_status_code,
            RANK() OVER (ORDER BY a.effective_from_date DESC) ASSET_RANK
         FROM vw_meter_point mp, asset a
         WHERE mp.meter_point_reference = vMeterPointReference
         AND   mp.supply_start_date = (SELECT MAX(supply_start_date)
                                       FROM   VW_METER_POINT mp2
                                       WHERE  mp2.meter_point_reference = vMeterPointReference
                                       )
         AND a.meter_point_id = mp.meter_point_id
         )
  WHERE ASSET_RANK = pRank;


The compile error I get is...

Encountered the symbol "(" when expecting one of the following:
, from

Any help would be much appreciated.