I have the Unlimited Sitemap generator version and I am trying to crawl the site and make a new sitemap by pressing the Crawl tab and then checking the box "Do not interrupt the script even after closing the browser window until the crawling is complete" then I click the Run button as always. After a short while the generator stops telling this:
"Error writing to these files:
Please correct files permissions and resume sitemap creation."
I have changed permissions to 666 first and then to 777 on both files but the error come back.
How can I make it work again?