SharePoint - Cannot peform this operation. The file is no longer checked our or has been deleted

Problem:

Recently I faced a problem, that in SharePoint Designer (2010), one of my file I checked out and then I checked Inn. Again when I opened my SharePoint site in Designer, it was showing the same file as checked inn. So I thought I might have forgot to check Inn. I again tried to check Inn, but it promt me an error message : 

               " Cannot peform this operation. The file is no longer checked our or has been deleted  "

Solution:

It is because of the cache being mantained with respect to user websites and application data.
What you have to do is, go to following locations :

• %APPDATA%\Microsoft\Web Server Extensions\Cache
• %USERPROFILE%\AppData\Local\Microsoft\WebsiteCache

And clear all the content inside both folders. and try again, you are done!!

Hope this help!!