Thanks for your very prompt response David! All I can tell you is I don't think so. I hired a bright young guy to do the heavy lifting so I suppose it's possible. But we worked pretty closely on this and he ever mentioned any such extension. If it helps here's a screen shot of where the "not downloadable yet" message occurs, except now, having ignored the message and clicked on the filename which was then successfully downloaded, the text is changed to "(xx.xx KiB) Downloaded x time".