why does websave creates empty files?

I run

baseurl = "https://www.sonecompany.com/xml/";
datelimits = datetime({'20080401', '20080601'}, 'InputFormat', 'yyyyMMdd','Format','yyyyMMdd');
subfile_limit = 5;  %no more than _5 -- adjust as appropriate
subfile_modifier = ["_" + (1:subfile_limit)] + ".xml";

for Day = datelimits(1):datelimits(2)
    daystr = string(Day);
    for Sub = subfile_modifier
        filename = "A_" + daystr + Sub; 
        url = baseurl + filename;
        
        % Set up a directory+filename
        
        path_to_save = "E:";
        out_name_path = path_to_save+filename;
        
        try
            outfilename = websave(out_name_path,url);
            fprintf('fetched %s\n', filename);
        catch
            break;  %skip remaining subfiles for this date upon first failure
        end
    end
end

The output is

https://imgur.com/a/qcexuSS

that has correct files (xml) files but redundant xml.html files. Why?

[Jan]

Please post the images directly instead of an imgur link.

I do not understand this sentence: "that has correct files (xml) files but redundant xml.html files".

[alpedhuez]

These xml files are in the website. But those xml.html files are not in the website. I use delte command in Matlab to remove these files from the download directory. But still would like to know why such things happened.

[Peter Perkins]

Mostly unrelated: You don;'t need both format arguments, just Format will do:

>> datelimits = datetime({'20080401', '20080601'}, 'Format', 'yyyyMMdd')
datelimits = 
  1×2 datetime array
   20080401   20080601

Answer 1

[Jan]

        path_to_save = "E:";
        out_name_path = path_to_save+filename;

This produces file names like "E:A_20080401_5.xml". A valid file name has a file separator after the drive letter: "E:\" . Prefer fullfile() to join folder and file names.

[alpedhuez]

Thank you. So should it always end with "\"?

[Jan]

After the drive letter a file separator is required as well as between all folders.

[alpedhuez]

Okay thank you.