error in netcdf file (vardata = ncObj.read(varName, varargin{:});) worked earlier.

Hi, I have written a code to read data from .nc file. Some days earlier it was fine. However, suddenly it is showing following errors. I also tried re-writing the code using online help but no success. My code is simple.

files = dir('*.nc'); 
numfiles = length(files);
nc = cell(1, numfiles);
for k=1:numfiles;
      nc= netcdf.open(files(k).name);
      altti{k}=ncread(files(k).name,'tpaltitude_top');
end;

There are also other lines but I am getting error from 1st line. The error is as follows,

Error using internal.matlab.imagesci.nc/getGroupAndVarid (line 2076)
Could not find variable or group 'tpaltitude_top' in file.
Error in internal.matlab.imagesci.nc/read (line 594)
            [gid, varid] = getGroupAndVarid(this, location);
Error in ncread (line 59)
vardata = ncObj.read(varName, varargin{:});
Error in column_brightness_plot (line 11)
      altti{k}=ncread(files(k).name,'tpaltitude_top');

I have checked using ncdisp('') that 'tpaltitude_top" does exist in .nc files. Need help. Thanks in advance.

[per isakson]

These two lines don't belong to the example

nc = cell(1, numfiles);
nc = netcdf.open(files(k).name);

ncread opens and closes the file.

[Madan Kumar]

What do you mean? I didn't get you.

[per isakson]

I mean that since ncread itself opens and closes the file, there is no reason to include those two lines in the code in the question. To me it looks strange, but I have not checked whether it can cause any problems.

[Madan Kumar]

I have tried running the code by incorporating your suggestion but no success. Still the same error.

[KSSV]

You check whether the said variables present in file. Just using ncdisp and ncread will do all the business.

[Madan Kumar]

It is there I have checked it.

[Walter Roberson]

Could you zip the .nc file and attach the zip for our testing?

[Madan Kumar]

Thank you so much. Now I sorted it out. I apologise. A .nc file from another satellite was also there in the same directory that was creating problem. I removed it by checking manually. I was in trouble for last 3 days. Thank you much.

[shobhit pipil]

Madan kumar would you please check my code for the same error.

https://uk.mathworks.com/matlabcentral/answers/441758-unable-to-extract-data-for-extact-days-in-netcdf-files-to-text-files-swat-tempreture-data-max-min-r?s_tid=prof_contriblnk