Tk::Error: named font "{arial} 6 {normal}" already exists at C:/usr/lib/Tk/Font.pm line 76.
   at C:/usr/lib/Tk/Widget.pm line 256
   Tk callback for .toplevel
   Tk callback for .toplevel.displaydatabase.frame
   Tk callback for font
   Tk callback for .toplevel.button
   <ButtonRelease-1>
   (command bound to event)