Syntax error (ignored by mad-x) in sequence file

! Pole face windings (PFW)
  ER.XFW11  : XFW01; ! Arc 10
  ER.XFW12  : XFW02; ! Arc 10
  ER.XFW21  : XFW02; ! Arc 20
  ER.XFW22  : XFW01; ! Arc 20
  ER.XFW31  : XFW01; ! Arc 30
  ER.XFW32  : XFW02; ! Arc 30
  ER.XFW41, : XFW02; ! Arc 40 <<<<< there is a misplaced comma after the element name
  ER.XFW42  : XFW01; ! Arc 40