I've been using this add on since November & until today it's been working fine with no probs whatsoever.
Over the last week or so I've been adding a lot of products (5000 or more at a time), and on a daily basis I've updated the sitemaps.
Today however it's not updated and I'm getting the result as below.
I've tried the alternate setting, checked the file permissions.
If anyone can help I will be eternally grateful
Save Path /home/content/15/xxxxxxxxxxxxx/html/catalog/