Query Help ! SP TN Help!

Hi,

Prerequisite:

1) Item Cost was per WH

2) There is a UDF in OWHS with value YES OR NO

3) Table involve: OWOR, WOR1, OTIM, OITW, OWHS

Requirement:

1) If the WOR1.ItemCode is OITM.InvntItem = 'Y', and

2) the WOR1.Warehouse is OWHS.U_UDF = 'YES', and

3) WOR1.ItemCode in WOR1.Warehouse and the OITW.AvgPrice IS NOT NULL

The below query dosn't work:

IF @OBJECT_TYPE ='68'AND @TRANSACTION_TYPE IN('A','U')

  BEGIN

   IFEXISTS(

    SELECT T1.ItemCode FROM OWOR T0 

INNERJOIN WOR1 T1 ON T0.DocEntry = T1.DocEntry

INNERJOIN OITM T2 ON T1.ItemCode = T2.ItemCode

INNERJOIN OWHS T3 ON T1.Warehouse = T3.WhsCode

INNERJOIN OITW T4 ON T1.ItemCode = T4.ItemCode

    where T1.ItemCode = T2.ItemCode AND T1.Warehouse = T4.WhsCode ANDIsNull(T4.AvgPrice, 0)= 0 AND T2.InvntItem ='Y'AND T3.U_ITEM_COST ='YES'AND T0.DocEntry = @list_of_cols_val_tab_del)

   Begin

    SELECT @ERROR=999,@ERROR_MESSAGE='xxxxx!'

  End

END

Anyone please help.

Thanks