SDF file has no discernable X coordinate

[Remi Meynadier]

Hi folks

i want to open a netcdf file (see the ncdump -h below) but with no success :

i've tried :

-sdfopen myfile.nc :
GRads answered :
Scanning self-describing file:  ISBA_Evap_exp2_2006.nc
SDF file has no discernable X coordinate.

- i've created a ddf file (see below)
GRads:
"Scanning description file:  isba.ddf
NetCDF Error (nc_open): Unable to open file"

Does someone have an idea of what's going on ?

Thanks in advance
Remi



netcdf ISBA_Evap_exp2_2006 {
dimensions:
        lon = 101 ;
        lat = 51 ;
        z = 3 ;
        time = UNLIMITED ; // (365 currently)
variables:
        float lon(lon) ;
                lon:valid_range = -20.f, 30.f ;
                lon:associate = "lon" ;
                lon:units = "degrees East" ;
                lon:long_name = "lon" ;
        float lat(lat) ;
                lat:valid_range = -5.f, 20.f ;
                lat:associate = "lat" ;
                lat:units = "degrees North" ;
                lat:long_name = "lat" ;
        int z(z) ;
                z:valid_range = 1, 3 ;
                z:associate = "z" ;
                z:units = "-" ;
                z:long_name = "Level Index (increasing below surface)" ;
        int time(time) ;
                time:units = "timesteps since 2006-01-01 00:00:00" ;
                time:title = "Time steps" ;
                time:tstep_sec = 86400.f ;
                time:long_name = "Time step axis" ;
                time:time_origin = " 2006-JAN-01 00:00:00" ;
        float Evap(time, lat, lon) ;
                Evap:associate = "time lat lon" ;
                Evap:units = "kg m-2 day-1" ;
                Evap:long_name = "Total Evapotranspiration" ;
                Evap:missing_value = 1.e+20f ;

// global attributes:
                :Conventions = "COARDS" ;
                :filename = "ISBA_Evap_exp2_2006.nc" ;
                :CreatedBy = "Aaron Boone at CNRM Meteo-France" ;
                :title = "ISBA results for ALMIP" ;
                :project = "ALMIP-PhaseI" ;
                :production = "Transfered to the single file on 20071120
at 155716.264" ;
}

ddf file

dset ISBA_EVAP_exp2_2006.nc
dtype netcdf
undef -1e15 missing_value
unpack scale_factor add_offset
title evaporation daily cumul
xdef 101 linear  -20.  0.5
ydef 51 linear  -5  0.5
zdef 3 linear 1 1
tdef 365 linear 00z01jan2006 1dy
vars 1
evap 1 t,x,y evaporation cumul
endvars