; This script won't run unless you download the gsn_csm_640_fix.ncl
; file and uncomment this line.
load "./gsn_csm_640_fix.ncl"

begin
  f     = addfile ("$NCARG_ROOT/lib/ncarg/data/cdf/uv300.nc","r")
  u     = f->U 

  yref = (/10,30/)
  xref = -30
  nyref = dimsizes(yref) 
  nxref = dimsizes(xref) 

  wks   = gsn_open_wks ("png","xyreflinesbug")

  res                  = True
  res@xyLineThicknessF = 3.0
  res@gsnYRefLine      = yref
  res@gsnXRefLine      = xref
  res@tiMainString     = nyref + " Y ref line(s), " + nxref + " X ref line(s)"
  res@gsnYRefLineColor = "MediumPurple"
  res@gsnXRefLineColor = "Orange"
  res@gsnXRefLineThicknessF = 3.0
  res@gsnYRefLineThicknessF = 3.0
  plot1 = gsn_csm_xy (wks,u&lat,u(0,:,{82}),res)

end