...even if this was possible, surely I would still have the DOWLOAD button still visible on the page for the user to click on - and this may confuse them if there is nothing there.

possibly best if I upload a simple PDF with each article which users see if they do happen to click on download (and this way they won't get a critical error message for trying to click on download when there is nothing there).

thanks,
Mark.

yes, that was the idea.

If file uploaded display download button.

if NO file uploaded - DONT display button.

but it's not that important - I can live without it.

thanks,
mark