Error reading .nc4 file: 'Unknown file format (NC_ENOTNC)'

18 visualizaciones (últimos 30 días)
juan ignacio gossn
juan ignacio gossn el 25 de Nov. de 2016
Comentada: Rimal Abeed el 7 de En. de 2020
Hi there,
Am trying to read a .nc4 file using ncread('filename') and get:
>> ncread('S3A_OL_SRF_20160713_mean_rsr.nc4')
Error using netcdflib
The NetCDF library encountered an error during execution of 'open' function -
'Unknown file format (NC_ENOTNC)'.
Error in netcdf.open (line 60)
[varargout{:}] = netcdflib ( 'open', filename, varargin{1} );
Error in internal.matlab.imagesci.nc/openToRead (line 1249)
this.ncRootid = netcdf.open(this.Filename,'NOWRITE');
Error in internal.matlab.imagesci.nc (line 122)
this.openToRead();
Error in ncread (line 54)
ncObj = internal.matlab.imagesci.nc(ncFile);
Any suggestion will be kindly appreciated
Thanks,
Juancho

Iniciar sesión para responder a esta pregunta.

Respuestas (3)

Tamir Suliman
Tamir Suliman el 25 de Nov. de 2016
It might be corrupted file or over written try to re copy it again that's the message one gets if the file is not there with the netCDF functions.
  2 comentarios
juan ignacio gossn
juan ignacio gossn el 27 de Nov. de 2016
Thanks Tamir for your reply, I tried downloading it again and used different versions of matlab but it continues to throw the same message
Juan
Rimal Abeed
Rimal Abeed el 7 de En. de 2020
His suggestion fixed my problem!

Iniciar sesión para comentar.

Walter Roberson
Walter Roberson el 25 de Nov. de 2016
Check the first few bytes of the file. If they are 'CDF' then it might be a valid netCDF file but it would not be a NetCDF-4 file. NetCDF-4 files are HDF5 files. If it is NetCDF-4 stored as HDF5, then the file should begin with
Hex: 89 48 44 46 0d 0a 1a 0a
ASCII: \211 HDF \r \n \032 \n
  2 comentarios
juan ignacio gossn
juan ignacio gossn el 27 de Nov. de 2016
Editada: Walter Roberson el 27 de Nov. de 2016
Thanks Walter for your reply, the first bytes are completely different from what you state:
<!DOCTYPE html><html lang="en" xmlns:fb="http://ogp.me/ns/fb#" xml:lang="en" class="" xmlns="http://www.w3.org/1999/xhtml">
though its termination is clearly .nc4 .... :S
Walter Roberson
Walter Roberson el 27 de Nov. de 2016
http://stackoverflow.com/questions/11344185/what-kind-of-code-is-http-ogp-me-ns-fb
It appears that is related to JSON and to Facebook's OpenGraph protocol.
Possibly there is NetCDF-4 represented in the content, but the data structure itself is not NetCDF-4

Iniciar sesión para comentar.

juan ignacio gossn
juan ignacio gossn el 21 de Dic. de 2016
Thank you, sorry for my late reply. Actually the file was corrupted, so, nothing to do with Matlab.
Thanks a lot!
Juancho

Categorías

Más información sobre NetCDF Files en Help Center y File Exchange.

Etiquetas

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by