Hi, I want to know about that ,what should i do after correcting crawl error? I really irritate from crawl error .please help me out.
This tells you that Google can't crawl (visits!) your page... Check your robots.txt if you are not blocking something from there!
Monitor the performance and availability of your website directly to rule out any errors produced by your own web server. There are a number of free and paid services you can use: Pingdom, StatusCake, Monitor.Us, updown.
If you've already corrected the error then you should see an option to "Recheck"... If not, just be patient and Google will automatically see that and correct itself soon.
This happens when google bot gets an error while crawling your page. With help of this you can monitor performance of your Pages. After correcting this error update your sitemap and fetch all your pages through google webmaster tool.