<div dir="ltr"><div>Hi,</div><div>I am trying to plot a variable from model grib2 output which is rotated grid following this example : <br></div><div><a href="https://www.ncl.ucar.edu/Applications/Scripts/rotatedltln_1.ncl">https://www.ncl.ucar.edu/Applications/Scripts/rotatedltln_1.ncl</a></div><div><br></div><div>Attached is ncl_filedump of the file. Following the example, when I am trying to plot it shows following error : <br></div><div>warning:Attempt to reference attribute (Longitude_of_southern_pole) which is undefined<br>warning:Attempt to reference attribute (Latitude_of_southern_pole) which is undefined<br>(0)     gsn_csm_map_ce: Fatal: The resources mpMinLatF/mpLeftCornerLatF must be less than the resources mpMaxLatF/mpRightCornerF.<br>(0)     Execution halted.</div><div><br></div><div>For plotting resource using the following : <br></div><div><br></div><div> res = True<br>  res@gsnDraw = False<br>  res@gsnFrame = False<br>  res@gsnAddCyclic           = False<br>  res@cnFillOn               = True               ; color fill  <br>  res@cnLinesOn              = False              ; no contour lines<br>  res@cnLineLabelsOn         = False              ; no contour labels<br>  res@cnInfoLabelOn          = False              ; no contour info label<br>  res@gsnStringFontHeightF = 0.018<br>  res@mpDataBaseVersion      = "MediumRes"        ; better map outlines<br>  res@pmTickMarkDisplayMode  = "Always"           ; turn on tickmarks<br>  <br>;  res@tiMainString           = "Native Lambert Conformal Grid"<br>  res@tiMainFontHeightF      = 0.014              ; smaller title<br>  res@tiMainOffsetYF         = -0.005             ; move title down<br>  <br> res@gsnMaximize            = True               ; enlarge image  <br>  res@lbLabelBarOn         = False<br><br>   res@mpOutlineBoundarySets     = "GeophysicalAndUSStates"<br>  res@mpOutlineDrawOrder = "PostDraw"</div><div><br></div><div>  res@tfDoNDCOverlay = True<br>  res@mpLimitMode            = "Corners"          ; choose region of map<br>  res@mpLeftCornerLatF       = lat2d(nlat-1,0) <br>  res@mpLeftCornerLonF       = lon2d(nlat-1,0)<br>  res@mpRightCornerLatF      = lat2d(0,nlon-1)      <br>  res@mpRightCornerLonF      = lon2d(0,nlon-1) <br><br>  ;res@mpCenterLonF           = lon2d@Longitude_of_southern_pole <br>  ;res@mpCenterLatF           = lon2d@Latitude_of_southern_pole + 90</div><div><br></div><div>Any help on what needs to be done. <br></div><div>Thanks</div><div>Debasish<br></div><div><br></div></div>