How do I continue to read files in a loop when an error occurs?

Hello, I am trying to read .FIT files provided by my teacher and when reading the last bunch of them an error occurs. I tried using a try catch to continue, and it skips over and continues the loop, but I am not getting my value D.

Error using fitsinfo>openFile (line 760)

Unable to open file. File might be corrupt or filename might have unsupported characters.

for l = 100:999
    try
        fit2file = sprintf('x.000000%d.FIT',l); 
        D = fitsread(fit2file);
    catch
    end
end

Thank you in advance

[Mario Malic]

Try reading the file that causes the error to check if it's corrupted. If It's not, consider renaming your files, 'x.00001.FIT' could be prone to failures.

[Walter Roberson]

your loop overwrites D with the last file content it was able to read, but does not define D if no files could be read.