I see the following error on one of my sites in my webmaster tools account: Your site returned an error when requested for robots.txt. More Details I don't use robots.txt file for this site, but I had the code <meta name="robots" content="noindex,nofollow"/> in the head tag of my website, as I didn't want Google to index it. However, I have changed my mind and have removed that code, so it should be fine now. Why there is a robots.txt error when I'm not using robots.txt?
It is looking for a robots.txt file and you do not have one. It should not hurt you to not have one, but you can always create a simple one if you want to make the error go away. Below are some instructions on the robots.txt and a tool to help you create one. http://googlewebmastercentral.blogspot.com/2008/03/speaking-language-of-robots.html http://tools.seobook.com/robots-txt/generator/
If you don't have robots.txt file then ignore that error message. That is only the indication to remind you about not having a robots.txt file. No harm at all.
I already created a robots.txt file for my site using Google webmaster tools and I uploaded it into the root, but the error still shows and my site still isn't indexed in Google even if I had already built some backlinks for it (it's a new site).