Passing global variable

HI,
WHEN-Button-pressed on first from
:global.a_sale_order_no := :sale_order.sale_order_no;
open_FORM('C:\test_report\final_to_be_added_to_main\DELEVERY_MASTER_new');ANd the open_form DELEVERY_MASTER_new
WHEN-NEW-FROM-INSTANCE(code) is
Set_Window_Property('DELIVERY_DETAIL', WINDOW_STATE, Maximize);
SELECT s.cust_id,s.SALE_ORDER_NO,s.PARTY_NAME,s.SEASON_YEAR, s.DEL_DATE,c.CURRENCY,S.delivery_address,S.SHOWROOM_ADDRESS,
S.INVOICE_ADDRESS,s.SHIP,s.PAYMENT_TERM,s.CONTACT_PERSON||chr(10)||s.CONTACT_NO,s.vat_no INTO :delivery_master.cust_id,
:delivery_master.sale_order_no,:delivery_master.CUSTOMER_NAME,:delivery_master.SEASON,:delivery_master.DEL_PERIOD,
:delivery_master.CURRENCY,:delivery_master.DELIVERY_ADDRESS,:delivery_master.CUSTOMER_ADDRESS,
:delivery_master.ACCOUNTS_ADDRESS,:delivery_master.SHIPPER,:delivery_master.PAYMENT_TERMS,
:delivery_master.CONTACT_INFORMATION,:delivery_master.vat_no
FROM sale_order s,customer_master c
WHERE c.CUST_ID=s.cust_id and SALE_ORDER_NO = :global.a_sale_order_no ;I want when i press the button on first form then if sale_order_no already in delevery_master_new then message already in delevery_master_new
Please Guide
Thanks And Regards
Vikas Singhal

Vikas,
Change the WHEN-BUTTON-PRESSED trigger in first form with this one. And giving file path in the OPEN_FORM built-in is not advisable.
DECLARE
     CURSOR Cur_SOrder IS SELECT COUNT(*) FROM DELIVERY_MASTER WHERE SALE_ORDER_NO = :SALE_ORDER.SALE_ORDER_NO;
     Num_Temp NUMBER := NULL;
BEGIN
     OPEN Cur_SOrder;
     FETCH Cur_SOrder INTO Num_Temp;
     CLOSE Cur_SOrder;
     IF NVL(Num_Temp, 0) > 0 THEN
          MESSAGE('Already in Delivery Master');
          RAISE FORM_TRIGGER_FAILURE;
     END IF;
     :GLOBAL.a_sale_order_no := :SALE_ORDER.SALE_ORDER_NO;
     OPEN_FORM('DELEVERY_MASTER_new');
END;Regards,
Manu.
If my response or the response of another was helpful, please mark it accordingly

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