Error read data from HYCOM

Dear everyone,

I am trying to read data from HYCOM. Here the code that I use.

opdurl = ' http://tds.hycom.org/thredds/dodsC/GLBu0.08/expt_91.2 ' ;
ncdisp(opdurl);

But I got error as below, I don't know what's going it.

I really appriciate for your help.

Error using netcdflib
The NetCDF library encountered an error during execution of'open' function-'I/O failure (NC_EIO)'.If the data source was an OPeNDAP URL ,see the OPeNDAP Troubleshooting section in the  
Users Guide.

Error in netcdf.open (line 67)
        [varargout{:}] = netcdflib ( 'open' ,filename, varargin{1} );

Error in internal.matlab.imagesci.nc/openToRead (line 1278)
            this.ncRootid = netcdf.open(this.Filename, 'NOWRITE' );

Error in internal.matlab.imagesci.nc (line 121)
                    this.openToRead();

Error in ncdisp (line 62)
ncObj = internal.matlab.imagesci.nc(ncFile);

Error in EX13 (line 2)
ncdisp(opdurl);

[Walter Roberson]

you appear to have an extra space at the end of the url

[Vinhteang Kaing]

Thank Walter for your response.

But actually, when I write in command window, there are no space. And still got this error.

[Walter Roberson]

It appears that hycom.org is being run as a consortium that includes USA government agencies. Some US government resources are blocked for access from some countries.

It looks to me as if you are probably in Japan, and I would not normally expect Japan to be blocked... but I have seen cases where data was restricted to USA, or was restricted to USA and Canada.

Have you been able to access files on that site from other system?

Answer 1

[Walter Roberson]

Your url has an extra space at the beginning and the end.

I deleted them and tried and had no problem.

[Vinhteang Kaing]

Oh, really? When I write in commd window of Matlab, I don't use space but I got error.

So, is it possible that it come from my sever proxy?

[Walter Roberson]

opdurl = 'http://tds.hycom.org/thredds/dodsC/GLBu0.08/expt_91.2' ;
ncdisp(opdurl);

Source:
         http://tds.hycom.org/thredds/dodsC/GLBu0.08/expt_91.2
Format:
         classic
Global Attributes:
         classification_level     = 'UNCLASSIFIED'
         distribution_statement   = 'Approved for public release. Distribution unlimited.'
         downgrade_date           = 'not applicable'
         classification_authority = 'not applicable'
         institution              = 'Naval Oceanographic Office'
         source                   = 'HYCOM archive file'
         history                  = 'archv2ncdf2d'
         comment                  = 'p-grid'
         field_type               = 'instantaneous'
         Conventions              = 'CF-1.6 NAVO_netcdf_v1.1'
Dimensions:
         depth = 40
         lat   = 2001
         lon   = 4500
         time  = 920

[Walter Roberson]

and so on

[Vinhteang Kaing]

Yes, this is the right one. I still have no idea why my pc cannot run.

Thank you a lot.