Oracle Forms

Hi all

i have two triggers on a item

first is when-validate-trigger

BEGIN
	SELECT prod_code,prod_name,prod_color,xs,s,m,l,xl,pcs 
	INTO 	:gin_detail1.prod_id1,:gin_detail1.prod_name,:gin_detail1.color,
	:gin_detail1.xs,:gin_detail1.s,:gin_detail1.m,:gin_detail1.l,:gin_detail1.xl,:gin_detail1.pcs 
	FROM product_barcode
	where barcode = :gin_detail1.prod_id;
	next_record;
end;

and the seocnd is key-next-item

DECLARE
	A number;
	B number;
	C number;
	D number;
	E number;
	F number;
	--CURSOR C1 IS 
BEGIN
		SELECT XS,S,M,L,XL,PCS INTO A,B,C,D,E,F from SALE_ORDER_ACCOUnt 
	where PROD_iD=:gin_detail1.prod_id
	and color=:gin_detail1.color ;
	IF :GIN_DETAIL1.s > b THEN
	MESSAGE('pLEASE CHECK THE STOCK');
	MESSAGE('pLEASE CHECK THE STOCK');
	go_item('gin_detail1.prod_id');
	ELSE
		update sale_order_account
		set s = s-1 where PROD_iD=:gin_detail1.prod_id
	and color=:gin_detail1.color ;
				next_record;
		END IF;
		next_record;
END;

when i run the form and press the on that item where i put my code the error comes
* FRM-40735 KEY-next-item trigger raised unhandeled exception ORA-01403*

Please Guide
Thanks And Regards
Vikas Singhal