nc files of ERA5-complete can not read in matlab2021b

Error using the matlab.internal.imagesci.net cdflib NetCDF library encounters an error during the execution of 'open' function - 'Unknown file format (NC ENOTNC)'.

Error netcdf. Open (line 67) [varargout {that}] = matlab.internal.imagesci.net cdflib (' open ', filename, varargin {1});

Error Internal.matlab.Imagesci. Nc/openToRead (line 1280) enclosing ncRootid = netcdf. Open (this Filename, 'NOWRITE');

Error Internal.matlab. Imagesci. Nc (line 124) enclosing openToRead ();

Error ncdisp (line 62) ncObj = internal. Matlab. Imagesci. Nc (ncFile);

when  i downloaded files of 'lnsp,specific humidity' from ERA5-complete, these files can not be opend. and the wrong messages in matlab are listed as above.

I wonder is there any problem with data after the move of dataset.

the download script in python is listed as follow:

Or is there any wrong with my request code.

Help, please.

Yours,

David.

2022.11.27

Kevin Marsh 

Thanks Kevin.

import cdsapi
from subprocess import call
import calendar


def IdmDownloader(request_url, storage_path, file_name):
    idm_engine = "C:\\Program Files (x86)\\Internet Download Manager\\IDMan.exe"
    call([idm_engine, '/d', request_url, '/p', storage_path, '/f', file_name, '/a']
    call([idm_engine, '/s'])

if __name__ == '__main__':
    c = cdsapi.Client()
    KeyWordsDic = {
                'date': '20190101',
                'levelist': '1/to/137',
                'levtype': 'ml',
                'param': '133',  
                'stream': 'oper',
                'time': '00/to/23/by/6',
                'type': 'an',
                'area': '90/-180/-90/180',
                'format': 'nc',
                'grid': '1.0/1.0',
            }
    for y in range(2021, 2022):
        for m in range(9, 10):
            d_ym = calendar.monthrange(y, m)[1] #
            for d in range(26, 31):  # d_ym + 1
                date = str(y) + str(m).zfill(2) + str(d).zfill(2)
                print("%d %d" % (m, d))
                KeyWordsDic['date'] = date
                r = c.retrieve('reanalysis-era5-complete', KeyWordsDic, )  # , File_Name
                Request_url = r.location
                # path = "E:\\XDW\\Atm_RawData\\ERA5_DATA_nc\\Single_day\\t"
                path = "E:\\"
                File_Name = 'ERA5_' + 't' + '_' + date + '.nc'
                IdmDownloader(Request_url, path, File_Name)