CALLING the LOV PROGRAMETICALLY

Question

Dear Friend
I want to rest the show_lov ,because it always shows only the first lov , it goes to the second if statement but it shows only the first lov that is 'MACHINES_GRAN' and it does not show the second lov 'MACHINE_REB'
My script as the following it is set to the key_listval in the field trigger.
BEGIN
IF :ISSUE_MACHINE_DETAILS.D_ITEM_CODE='3911500001' THEN
SET_ITEM_PROPERTY('ISSUE_MACHINE_DETAILS.D_MACH_CODE',LOV_NAME,'MACHINES_GRAN');
DECLARE
a_value_chosen BOOLEAN;
BEGIN
a_value_chosen := show_lov('MACHINES_GRAN');
END;     
END IF;     
IF :ISSUE_MACHINE_DETAILS.D_ITEM_CODE ='3101670001' OR :ISSUE_MACHINE_DETAILS.D_ITEM_CODE ='3101690001' THEN
SET_ITEM_PROPERTY('ISSUE_MACHINE_DETAILS.D_MACH_CODE',LOV_NAME,'MACHINE_REB');
DECLARE
b_value_chosen BOOLEAN;
BEGIN
b_value_chosen := show_lov('MACHINE_REB');
END;     
END IF;
END;

Answer 1

Dear Friend
I make this change to my script, and it works fine
DECLARE
lov_id LOV;
BEGIN
IF :ISSUE_MACHINE_DETAILS.D_ITEM_CODE='3911500001' THEN
DECLARE
a_value_chosen BOOLEAN;
BEGIN
lov_id := Find_LOV('MACHINE_GRAN');
IF Get_LOV_Property(lov_id,GROUP_NAME) = 'MACHINE_REBO' THEN
Set_LOV_Property(lov_id,GROUP_NAME,'GRANULATOR');
SET_ITEM_PROPERTY('ISSUE_MACHINE_DETAILS.D_MACH_CODE',LOV_NAME,'MACHINE_GRAN');
a_value_chosen := show_lov('MACHINE_GRAN');
ELSE
     SET_ITEM_PROPERTY('ISSUE_MACHINE_DETAILS.D_MACH_CODE',LOV_NAME,'MACHINE_GRAN');
     a_value_chosen := show_lov('MACHINE_GRAN');
END IF;      
END;     
ELSIF :ISSUE_MACHINE_DETAILS.D_ITEM_CODE ='3101670001' OR :ISSUE_MACHINE_DETAILS.D_ITEM_CODE ='3101690001' THEN
DECLARE
b_value_chosen BOOLEAN;
BEGIN
     lov_id := Find_LOV('MACHINE_REBO');
     IF Get_LOV_Property(lov_id,GROUP_NAME) = 'GRANULATOR' THEN
     Set_LOV_Property(lov_id,GROUP_NAME,'REBONDING');
     SET_ITEM_PROPERTY('ISSUE_MACHINE_DETAILS.D_MACH_CODE',LOV_NAME,'MACHINE_REBO');
     b_value_chosen := show_lov('MACHINE_REBO');
     ELSE
     SET_ITEM_PROPERTY('ISSUE_MACHINE_DETAILS.D_MACH_CODE',LOV_NAME,'MACHINE_REBO');
     b_value_chosen := show_lov('MACHINE_REBO');
     END IF;
     END;     
END IF;
END;
Thank you very much for your help
Best regards
Jamil Alshaibani