Custom Form Question

Question

Hi All,
I have developed a New Custom form from scratch using TEMPLATE.fmb . I have generated it and it allows me to save OK. I have based the Block on a view . The primary Key for my Table is vend_cat_id.
But, when I Query it and press the down arrow key to navigate to records (Its a single record block) or even change some field in the block , I get the error "FRM-40657 : record changed or deleted by another user".
My ON-lock trigger calls my custom package : and my code in my Custom pkg is as below, as per the Forms Dev Guide :
Any ideas what I may be doing wrong or can check ?
Many Thanks
Shankar
PROCEDURE Lock_Row IS
          counter      NUMBER;
          cursor c1 IS
          select      *
          from XX1
          where rowid = :blk.row_id
          for update nowait;
          recinfo      c1%rowtype;
begin
counter := 0;
loop
     begin
          counter := counter + 1;
          open c1;
          fetch c1 into recinfo;
          if (c1%notfound) then
               close c1;
          fnd_message.Set_Name('FND','FORM_RECORD_DELETED');
               fnd_message.Error;
               Raise form_trigger_failure;
          end if;
               close c1;
if (      (Recinfo.vend_cat_id = :blk.vend_cat_id)
AND (      (Recinfo.vendor_id = :blk.vendor_id)
     OR( (Recinfo.vendor_id IS NULL) AND (:blk.vendor_id IS NULL))
AND (      (Recinfo.vendor_site_id = :blk.vendor_site_id)
     OR( (Recinfo.vendor_site_id IS NULL) AND (:blk.vendor_site_id IS NULL))
AND (      (Recinfo.start_date_active = :blk.start_date_active)
     OR( (Recinfo.start_date_active IS NULL) AND (:blk.start_date_active IS NULL))
) -- end if
then
     return;
else
fnd_message.Set_Name('FND','FORM_RECORD_CHANGED');
     fnd_message.Error;
     raise form_trigger_failure;
end if;
exception
when APP_EXCEPTIONS.RECORD_LOCK_EXCEPTION then
     if (c1%isopen) then
     close c1;
     end if;
                                                  APP_EXCEPTION.Record_Lock_Error(Counter);
end;
end loop;
end lock_row;

Answer 1

Hi again,
Yes, I think that's the problem. It doesn't make sense to get a 'Do you want to save your changes?' message if you don't have anything to save (and if you have a non-database block, Oracle assumes you don't have anything to save).
Anyway, you can include a warning message in one of the form triggers that execute when someone tries to close the form (KEY-EXIT would be a possibility).
I hope it helps.