wrf utility (x11 vs. pdf/ps)

Hi,
I am trying to use the NCL/WRF utility to plot the model domain with this script:
http://www.mmm.ucar.edu/wrf/OnLineTutorial/Graphics/NCL/Examples/EXPERIMENTAL/wrf_show_wps_som_namelist.htm
I could see the domain with 'type=x11'. If I tried 'ps' or 'pdf', then I got 'Segmentation Fault'. I traced it line by line to this program:
WRFUserARW_add.ncl
The problem is with:
mp = gsn_map(wks,projection,opts)
I compared the 'wks', 'projection', and 'opts' between 'x11' and 'ps'/'pdf'. The difference is: (< is for 'x11', > is for 'ps')
Could someone tell me that this is because the 'ps'/'pdf' library or setting on my system? How could I fix it?
Many thanks,
Qian
====================================================
< Number Of Attributes: 2---> Number Of Attributes: 9> wkPaperHeightF : 11> wkPaperWidthF : 8.5> wkDeviceUpperY : 666> wkDeviceUpperX : 576> wkDeviceLowerY : 126> wkDeviceLowerX : 36> wkOrientation : 011c18< (0) wps_show_dom_namelist_x11 xWorkstationClass 8---> (0) gsnapp psWorkstationClass 873,87d79< (0) in3< (0) there< < < Variable: wks< Type: obj< Total Size: 4 bytes< 1 values< Number of Dimensions: 1< Dimensions and sizes: [1]< Coordinates: < Number Of Attributes: 2< name : wps_show_dom_namelist< app : wps_show_dom_namelist appClass 7< (0) wps_show_dom_namelist_x11 xWorkstationClass 8

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Received on Tue Oct 18 15:00:40 2011