To Adrian M. H.

Thanks for responding. This has been my first attempt to contribute to Wikipedia. Maybe my eyesight or concentration is lapsing. I did get as far as clicking the Upload button after which the 'empty file' response appeared. My intent had been to upload an article (as a file?) about prime numbers etc in the Mathematics/Primes section, having written it, edited it, saved the page, approved the preview and entered the article's title as the source, destination and summary.

What have I not done or done wrong?

Thanks 

MIF (Threshold Pilot)