Sir, 
While creating domain it shows error. 

./bin/terrain test_001.in

  This is Terrain part of RegCM package version 4
   SVN Revision:  compiled at: data : Mar  8 2021  time: 23:44:01

 : this run start at  : 2021-03-16 03:17:51+0530
 : it is submitted by : curaj
 : it is running on   : curaj-Precision-7820-Tower
 : in directory       : /home/curaj/RegCM-4.7.5.4/REGCM_RUN
                     
 
 Doing Horizontal Grid with following parameters
 iy     =           34
 jx     =           64
 ds     =    60.000000000000000    
 clat   =    45.390000000000001    
 clon   =    13.480000000000000    
 iproj  = LAMCON
 Grid setup done
 Geo mapping done
 Calculated large extrema:
          MINLAT =    34.000000000000000    
          MAXLAT =    55.000000000000000    
          MINLON =   -15.000000000000000    
          MAXLON =    43.000000000000000    
 Determined Grid coordinate range
 No resampling used.
 NetCDF: Unknown file format                                                    
 mod_rdldtr.F90 :      121:NetCDF Error: /home/curaj/RegCM-4.7.5.4/REGCM_GLOBEDAT/SURFACE/GMTED_DEM_30s.nc:          -51
STOP  Execution terminated because of runtime error
Here first of all, instead of the file GMTED_DEM_30s, there have another DEM file as per run guide. Also after downloading that file it shows that error. 

This might be netcdf library error. Kindly suggest where to  fix. 

Thanks and Regards