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