Yesterday I saw a problem in Google Webmaster Tools - it's saying that "Googlebot can not crawl your site because of DNS errors."
Please view this image & error date:
Then I immediately fixed the problems. Now I can see in the graph from two days there is not a DNS problem, but it's still showing a DNS error.
I am wondering how many days does it take Google to to refresh this DNS graph in order to remove the error?
Important Links: http://ansoftsys.com/sitemap.xml and http://ansoftsys.com/robots.txt.