What does rcVirtualItem 0 in the response code mean?
That is okay I figured it out.... sorry.
Just in case anyone else some day is searching for A1 Sitemap Generator and response codes, here's a link to the help page that explains all HTTP response and A1SG codes:
http://www.microsystools.com/products/sitemap-generator/help/server-http-response-codes/ (http://www.microsystools.com/products/sitemap-generator/help/server-http-response-codes/)