In Google Webmaster Tools showing: Errors for URLs in Sitemaps ‎(983)‎ HTTP errors ‎(1,719)‎ Not found ‎(182)‎ I don't know why its showing 1719 HTTP error. When I check all link in details, then see all link work well. What's happening and what I can do now?
First Don't Panic It seems like Google is having some fun with webmasters at the current moment in time. If this is the first time you have seen these errors when checking your sitemap details then I would simply give them a few days to download your sitemap again and I am sure most of the so called problem url's will have magically cleaned up. If that was the first time that you have ever checked your sitemap then you may have problems with your sitemap or your robots.txt file.
If you're using .txt site map then the problem could be for using http://www.yousite.com/page format url. coz as i know google don't allow www.. Just simply put all the urls i.e. http://yoursite.com/page and i hope the error would be solve.
Which sitemap format do you use? like atom,web,xml etc? Errors for sitemaps are generally normal..If your site was down during the crawl time an error is displayed till the next crawl..Give it some time.forget about it and concentrate on other issues