CDO

Dear experts,
I keep getting an error after performing:

cdo remapdis,targetgrid.nc -selvar,runoff myfile.nc output.nc

_

cdo remapdis: Started child process "selvar,runoff prova1.nc (pipe1.1)".
cdo remapdis (Abort): Unsupported grid type: generic_

My file is the following.

ncdump -h myfile.nc 
netcdf myfile {
dimensions:
    y = 55 ;
    x = 63 ;
variables:
    float lon(y, x) ;
        lon:units = "degreeE" ;
        lon:name = "nav_lon" ;
    float lat(y, x) ;
        lat:units = "degreeN" ;
        lat:name = "nav_lat" ;
    float runoff(y, x) ;
        runoff:coordinates = "nav_lon nav_lat" ;
    float mask(y, x) ;
    float socoefr(y, x) ;

Any idea?
g:

Thank you very much in advance.

PS targetgrid is too big to be uploadable.
It's structure is the following:

ncdump -h targetgrid.nc 
netcdf targetgrid {
dimensions:
    x = 205 ;
    y = 107 ;
    z = 98 ;
    t = UNLIMITED ; // (1 currently)
variables:
    float nav_lon(y, x) ;
    float nav_lat(y, x) ;
    float nav_lev(z) ;
    double time_counter(t) ;
    byte tmask(t, z, y, x) ;
    byte umask(t, z, y, x) ;
    byte vmask(t, z, y, x) ;
    byte fmask(t, z, y, x) ;
    byte tmaskutil(t, y, x) ;
    byte umaskutil(t, y, x) ;
    byte vmaskutil(t, y, x) ;
    byte fmaskutil(t, y, x) ;
    float glamt(t, y, x) ;
    float glamu(t, y, x) ;
    float glamv(t, y, x) ;
    float glamf(t, y, x) ;
    float gphit(t, y, x) ;
    float gphiu(t, y, x) ;
    float gphiv(t, y, x) ;
    float gphif(t, y, x) ;
    double e1t(t, y, x) ;
    double e1u(t, y, x) ;
    double e1v(t, y, x) ;
    double e1f(t, y, x) ;
    double e2t(t, y, x) ;
    double e2u(t, y, x) ;
    double e2v(t, y, x) ;
    double e2f(t, y, x) ;
    double ff(t, y, x) ;
    short mbathy(t, y, x) ;
    short misf(t, y, x) ;
    float isfdraft(t, y, x) ;
    double e3t_0(t, z, y, x) ;
    double e3u_0(t, z, y, x) ;
    double e3v_0(t, z, y, x) ;
    double e3w_0(t, z, y, x) ;
    float gdept_0(t, z, y, x) ;
    float gdepu(t, z, y, x) ;
    float gdepv(t, z, y, x) ;
    float gdepw_0(t, z, y, x) ;
    double gdept_1d(t, z) ;
    double gdepw_1d(t, z) ;
    double e3t_1d(t, z) ;
    double e3w_1d(t, z) ;

// global attributes:
        :DOMAIN_number_total = 1 ;
        :DOMAIN_number = 0 ;
        :DOMAIN_dimensions_ids = 1, 2 ;
        :DOMAIN_size_global = 205, 107 ;
        :DOMAIN_size_local = 205, 107 ;
        :DOMAIN_position_first = 1, 1 ;
        :DOMAIN_position_last = 205, 107 ;
        :DOMAIN_halo_size_start = 0, 0 ;
        :DOMAIN_halo_size_end = 0, 0 ;
        :DOMAIN_type = "BOX" ;
}