why does appear the error message: Error in table2cell t_vars = getVars(t,false);?

Dear community

I have a program to load several excel files:

datadir = 'C:\Users\Jonat\Desktop\limpio';
dinfo = dir( fullfile(datadir, '*.xlsx') );
filenames = fullfile( datadir, {dinfo.name} );
numfiles = length(filenames);
datatable = [];
for K = 1 : numfiles
    thisfile = filenames{K};
    thistable = readtable(thisfile);
    if K == 1
        datatable = thistable;
    else
        datatable = [datatable; thistable];
    end
end
Clean=table2cell(datatable);
nrow = height(datatable); 
lastidx = floor(nrow/9) * 9;
E_p = mean(reshape(datatable{1:lastidx,17}, 9, []));
E_C=E_p.';

When I first used this program, I didn´t have any problem, but now, appear this error:

Error in table2cell (line 21)
t_vars = getVars(t,false);

Please help!

Thank you so much

[Walter Roberson]

There are no .xlsx files in C:\Users\Jonat\Desktop\limpio\ so datatable is []

[Jonathan Bijman]

Thanks walter, but What thing should I write in this command in order to read the excel files? I don’t know Please help Thank u

[Walter Roberson]

After you assign to numfiles you should add the lines

assert(numfiles > 0,'no files found')

[Jonathan Bijman]

Thanks Walter =)