[netcdfgroup] grid not recognized

Hi all,

I created a netcdf file which I want to use with
ncwms. The file is not recognized by ncwms. I also tried toolsui 2 & 4 and idv. But non of the tools I tried seem to recognize my file as a gridded dataset.  Do you have any suggestions on how to improve it? You can find the header below.

Kind regards,

Frank



netcdf p04 {
dimensions:
    x = 50 ;
    y = 50 ;
    sigma = 5 ;
    time = UNLIMITED ; // (6 currently)
variables:
    float x(x) ;
        x:units = "m" ;
    float y(y) ;
        y:units = "m" ;
    float sigma(sigma) ;
    float time(time) ;
        time:units = "seconds since 1990-08-05 00:00:00" ;
    double lon(y, x) ;
        lon:units = "degrees_east" ;
        lon:standard_name = "longitude" ;
    double lat(y, x) ;
        lat:units = "degrees_north" ;
        lat:standard_name = "latitude" ;
    float v1(time, sigma, y, x) ;
        v1:long_name = "Ekofisk" ;
        v1:_FillValue = 999.999f ;
        v1:coordinates = "lon lat" ;
        v1:units = "kg/m2" ;
    float v8(time, sigma, y, x) ;
        v8:long_name = "LocalDepth" ;
        v8:_FillValue = 999.999f ;
        v8:coordinates = "lon lat" ;
        v8:units = "m" ;
}