Database Software

dear sir i have a problem button_palatte block. there are 10 buttons but when i click the currser at product_no then 3 message comes one by one.and i also defineing 3 button traggers and procedure scroll_control,

message is that

frm-40105 unable to resolve reference to item button_palatte pb_first, pb_next, pb_prior(previous)

(1)pb_first buttion (when_button_pressed)

BEGIN

go_block('product_master');
/*Position the cursor on the first record of the current block*/
first_record;
END;
(2)pb_prior buttion (when_button_pressed)

BEGIN
go_block('product_master');
/*Position the cursor on the prior record of the current block*/
previous_record;
END;
(3)pb_next buttion (when_button_pressed)

BEGIN
go_block('product_master');
/*Position the cursor on the next record of the current block*/
next_record;
END;

scroll_control (procedure_body)

PROCEDURE SCROLL_CONTROL IS
BEGIN
/*System.last_record is a system variable that holds a value
which indicates whether the current record is the last record in a
block. It can have two values i.e. TRUE:(current record is the last
record) and FALSE:(current record is not the last record)
Cursor_record, is a system variable that holds the current record
number. If the current record number is 1 and system.last_record
is 'TRUE' all the scroll buttons should be disable since there is
only one record in the form data buffer*/

if:system.last_record='TRUE' and :system.cursor_record='1' then
set_item_property('button_palette.pb_first',enabled,property_false);
set_item_property('button_palette.pb_prior',enabled,property_false);
set_item_property('button_palette.pb_next',enabled,property_false);
set_item_property('button_palette.pb_last',enabled,property_false);

/*if the current record is the last record, the scroll buttons for first
and prior should be enabled and the scroll buttons for last and
next should be disabled*/

elsif:system.last_record='TRUE' then
set_item_property('button_palette.pb_first',enabled,property_true);
set_item_property('button_palette.pb_prior',enabled,property_true);
set_item_property('button_palette.pb_next',enabled,property_false);
set_item_property('button_palette.pb_last',enabled,property_false);

/*if the current record number is 1, the scroll buttons for first and
prior should be disabled and the scroll buttons for last and next
should be enabled*/

elsif:system.cursor_record='1' then
set_item_property('button_palette.pb_first',enabled,property_false);
set_item_property('button_palette.pb_prior',enabled,property_false);
set_item_property('button_palette.pb_next',enabled,property_true);
set_item_property('button_palette.pb_last',enabled,property_true);

/*if the current record is not the last record and the record
number is not 1 then, all the scroll buttons should be enabled*/
else
set_item_property('button_palette.pb_first',enabled,property_true);
set_item_property('button_palette.pb_prior',enabled,property_true);
set_item_property('button_palette.pb_next',enabled,property_true);
set_item_property('button_palette.pb_last',enabled,property_true);

end if;
END;


item_enable_disable (procedure_body)

PROCEDURE item_enable_disable(item_true_false in number) IS



BEGIN

set_item_property('product_master.product_no',updateable,item_true_false);
set_item_property('product_master.description',updateable,item_true_false);
set_item_property('product_master.unit_master',updateable,item_true_false);
set_item_property('product_master.qty_on_hand',updateable,item_true_false);
set_item_property('product_master.reorder_1v1',updateable,item_true_false);
set_item_property('product_master.cost_price',updateable,item_true_false);
set_item_property('product_master.selling_price',updateable,item_true_false);


END;

i hope any one solve my proble
and give me hope full answer

thanks

ali