Access a mc or textfeild from a non document class.

Hey all.
This use to be simple in as2, but seems to allude me from as3. It used to be simple to access an object you put on the stage like a mc or dynamic text field by simply using _root.instanceName ect. Now I see references to making references to the Stage and such like:
private var stage:Stage;
stage = stageRef;
and I am still confused.
What I have going on is, I have placed a movieclip on the stage in Flash and gave it an instance name of Cell_mc.
I have a cusom class that extends MovieClip with the following imports
import flash.display.MovieClip;
import flash.events.Event;
import flash.events.EventDispatcher;
import flash.events.MouseEvent;
import flash.events.TimerEvent;
import flash.utils.Timer;
This Class is tied to a set of MovieClips in my Library.
I have a listener: this.addEventListener(MouseEvent.MOUSE_DOWN,pickUp);
And a function:
private function pickUp(event:MouseEvent):void
                  this.startDrag();
                  _interval = new Timer(100);
                  _interval.addEventListener(TimerEvent.TIMER,onInterval);
                  _interval.start();
And
private function onInterval(event:TimerEvent):void
                  //Set up hit test
                  this.hitArea(Cell_mc)
                        trace("hit");
I get the following error whenever I try to access an object I placed on the stage from anywhere other than the document class:
1120: Access of undefined property Cell_mc.
How do I access the cell_mc that is already on the stage from this non-document class?
Thanks guys.

try:
private var stage:Stage;
stage = stageRef;
and I am still confused.
What I have going on is, I have placed a movieclip on the stage in Flash and gave it an instance name of Cell_mc.
I have a cusom class that extends MovieClip with the following imports
import flash.display.MovieClip;
import flash.events.Event;
import flash.events.EventDispatcher;
import flash.events.MouseEvent;
import flash.events.TimerEvent;
import flash.utils.Timer;
This Class is tied to a set of MovieClips in my Library.
I have a listener: this.addEventListener(MouseEvent.MOUSE_DOWN,pickUp);
And a function:
private function pickUp(event:MouseEvent):void
                  this.startDrag();
                  _interval = new Timer(100);
                  _interval.addEventListener(TimerEvent.TIMER,onInterval);
                  _interval.start();
And
private function onInterval(event:TimerEvent):void
                  //Set up hit test
                  this.hitArea(MovieClip(root).Cell_mc)
                        trace("hit");
I get the following error whenever I try to access an object I placed on the stage from anywhere other than the document class:
1120: Access of undefined property Cell_mc.
How do I access the cell_mc that is already on the stage from this non-document class?
Thanks guys.

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Dear Experts
I have an SP which gives error " cannot access rows from a non-nested table item ". But here the strange thing is, it works fine with one query. But I write union query with another table, only then it gives error.
CREATE OR REPLACE PROCEDURE SP_MONTHLYSALESUMMARY (
P_TRANSACTIONMONTH VARCHAR2,
P_LEDGERID VARCHAR2,
O_RESULTSET OUT TYPES.CURSORTYPE)
AS
BEGIN
OPEN O_RESULTSET FOR
-- POINT OF SALE
SELECT
L.DESCRIPTION LEDGERNAME,
LS.DESCRIPTION LEDGERSUBGROUPNAME,
C.CORPORATENO
|| E.EMPLOYEENO
|| AF.AFFILIATEMEMBERNO
|| M.MEMBERNO
AS ID,
C.NAME || E.NAME || AF.NAME || M.NAME AS NAME,
SUM(CASE
WHEN PB.EMPLOYEE_ID IS NOT NULL
AND T.ISCREDITTRANSACTIONMODE = 2
THEN
PB.TAXAMOUNT
ELSE
0
END)
EMPLOYEEDEBITCARDTAXAMOUNT,
L.PRINTNO
FROM POINTOFSALEBILL PB
INNER JOIN POINTOFSALEBILLDETAIL PD
ON PB.POINTOFSALEBILL_ID = PD.POINTOFSALEBILL_ID
INNER JOIN TRANSACTIONTYPE TY
ON TY.TRANSACTIONTYPE_ID = PB.TRANSACTIONTYPE_ID
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ON L.LEDGER_ID = PD.LEDGER_ID
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LEFT JOIN EMPLOYEE E
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ON AF.AFFILIATEMEMBER_ID = PB.AFFILIATEMEMBER_ID
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ON M.MEMBER_ID = PB.MEMBER_ID
WHERE TY.ISDEBIT = 1 AND PB.FLAG = 0 AND T.ISROOMNO = 2
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OR P_TRANSACTIONMONTH =
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( (SELECT COLUMN_VALUE
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C.CORPORATENO
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REATE OR REPLACE FUNCTION BCLUB1868.GET_ROWS_FROM_LIST1
(L IN LONG DEFAULT NULL, SEP IN VARCHAR2 DEFAULT ',')
RETURN MYVARCHARTABLE1 PIPELINED
AS
L_POS INT := 1;
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L_PART VARCHAR(500);
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Request help from you all experts in the forum

Here it is
CREATE OR REPLACE PROCEDURE SP_GRCS (
P_TRANSACTIONMONTH VARCHAR2,
P_LEDGERID VARCHAR2,
O_RESULTSET OUT TYPES.CURSORTYPE)
AS
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|| E.EMPLOYEENO
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AND T.ISCREDITTRANSACTIONMODE = 1
THEN
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ELSE
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WHERE TY.ISDEBIT = 1 AND PB.FLAG = 0 AND T.ISROOMNO = 2
AND (P_TRANSACTIONMONTH IS NULL
OR P_TRANSACTIONMONTH =
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AND (P_LEDGERID IS NULL
OR L.LEDGER_ID IN
( (SELECT COLUMN_VALUE
FROM TABLE(GET_ROWS_FROM_LIST1 (
P_LEDGERID,
GROUP BY L.DESCRIPTION,
LS.DESCRIPTION,
C.CORPORATENO
|| E.EMPLOYEENO
|| AF.AFFILIATEMEMBERNO
|| M.MEMBERNO,
C.NAME || E.NAME || AF.NAME || M.NAME,
L.PRINTNO
UNION ALL
-- Guest Registration
SELECT L.DESCRIPTION LEDGERNAME,
LS.DESCRIPTION LEDGERSUBGROUPNAME,
C.CORPORATENO
|| E.EMPLOYEENO
|| AF.AFFILIATEMEMBERNO
|| M.MEMBERNO
AS ID,
C.NAME || E.NAME || AF.NAME || M.NAME AS NAME,
SUM(CASE
WHEN PB.EMPLOYEE_ID IS NULL
AND T.ISCREDITTRANSACTIONMODE = 1
THEN
PB.BILLAMOUNT
ELSE
0
END)
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L.PRINTNO
FROM GUESTREGISTRATION PB
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INNER JOIN LEDGER L
ON L.LEDGER_ID = PD.LEDGER_ID
INNER JOIN LEDGERSUBGROUP LS
ON LS.LEDGERSUBGROUP_ID = L.LEDGERSUBGROUP_ID
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ON C.CORPORATE_ID = PB.CORPORATE_ID
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ON E.EMPLOYEE_ID = PB.EMPLOYEE_ID
LEFT JOIN AFFILIATEMEMBER AF
ON AF.AFFILIATEMEMBER_ID = PB.AFFILIATEMEMBER_ID
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WHERE TY.ISDEBIT = 1 AND PB.FLAG = 0 AND T.ISROOMNO = 2
AND (P_TRANSACTIONMONTH IS NULL
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AND (P_LEDGERID IS NULL
OR L.LEDGER_ID IN
( (SELECT COLUMN_VALUE
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P_LEDGERID,
GROUP BY L.DESCRIPTION,
LS.DESCRIPTION,
C.CORPORATENO
|| E.EMPLOYEENO
|| AF.AFFILIATEMEMBERNO
|| M.MEMBERNO,
C.NAME || E.NAME || AF.NAME || M.NAME,
L.PRINTNO)
ORDER BY PRINTNO;
END SP_GRCS;
I have even tried adding L.Ledger_ID in select statement.

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