SharePoint Designer - Cannot perform this operation. The file is no longer check out or has been deleted

Problem Description:

The css file showed itself as being checked out when it was actually checked in.

Error Message:

SharePoint Designer - Cannot perform this operation. The file is no longer check out or has been deleted 

Resolution:

The problem is to delete your temporary internet files and to clear your website cache of all files. (Search WebsiteCache into My Computer) After this, everything will work again.

Product applies to:

·                     SharePoint Server 2010

·                     SharePoint Foundation 2010

Feel free to revert in-case of any query...