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I have imported my site from mybb to WordPress 3.9.1 All seems to fine but when I change permalinks from numeric to %postname% some of the posts shows the permalink correctly i.e.
www.example.com/A-new-post
however some posts shows only the domain i.e. post number 2 shows
www.example.com
I Tried all permalink settings all seems to work except %postname% which infect works but only converts partial posts to permalinks
My blog has too old posts over 2 years, so I need to open each post and its url converted to %postnum%