I am trying to do test simulation and have successfully installed. I have collected the data etc. Now trying out terrain here is the error I get:

 ./bin/terrain test_001.in

  This is Terrain part of RegCM package version 4
   SVN Revision: tag 4.4-rc6 compiled at: data : Jul 11 2013  time: 16:06:31

 : this run start at  : 2013-07-25 15:38:20+0200
 : it is submitted by : mmdoka
 : it is running on   : Marshall
 : in directory       : /home/mmdoka/Downloads/run
                     
 Doing Grid with following parameters
 iy     =          102
 jx     =          107
 ds     =    60.0000000000000    
 clat   =   -17.5000000000000    
 clon   =    35.0000000000000    
 iproj  = NORMER
 Grid setup done
 Geo mapping done
 Calculated large extrema:
          MINLAT =   -42.0000000000000    
          MAXLAT =    12.0000000000000    
          MINLON =    5.00000000000000    
          MAXLON =    66.0000000000000    
 Determined Grid coordinate range
 Using resampling at           15  minutes.
 Opening /home/mmdoka/Downloads/RegCM-4.4-rc6/PreProc/DATA/SURFACE/GTOPO_DEM_30s
 .nc
 No such file or directory                                                     
 
 mod_rdldtr.F90 :      139:NetCDF Error:            2
abort: Fortran Abort Called
mmdoka@Marshall:~/Downloads/run$ vi test_001.in
mmdoka@Marshall:~/Downloads/run$ ls
bin    output       regcm.in   test_001_bk.in  test_001.in~
input  postproc.in  regcm.in~  test_001.in     test_009.in
mmdoka@Marshall:~/Downloads/run$ ./bin/terrain test_001.in

  This is Terrain part of RegCM package version 4
   SVN Revision: tag 4.4-rc6 compiled at: data : Jul 11 2013  time: 16:06:31

 : this run start at  : 2013-07-25 15:42:04+0200
 : it is submitted by : mmdoka
 : it is running on   : Marshall
 : in directory       : /home/mmdoka/Downloads/run
                     
 Doing Grid with following parameters
 iy     =          102
 jx     =          107
 ds     =    60.0000000000000    
 clat   =   -17.5000000000000    
 clon   =    35.0000000000000    
 iproj  = NORMER
 Grid setup done
 Geo mapping done
 Calculated large extrema:
          MINLAT =   -42.0000000000000    
          MAXLAT =    12.0000000000000    
          MINLON =    5.00000000000000    
          MAXLON =    66.0000000000000    
 Determined Grid coordinate range
 Using resampling at           15  minutes.
 Opening /home/mmdoka/Downloads/RegCM-4.4-rc6/PreProc/DATA/SURFACE/GTOPO_DEM_30s
 .nc
 NetCDF: Unknown file format                                                   
 
 mod_rdldtr.F90 :      139:NetCDF Error:          -51
abort: Fortran Abort Called

Please kindly assist.