Drupal.settings.ckeditor is undefind in CKEditor module I have installed CKeditor module as per the guidelines of ckeditor README.txt file.
But in neither text area ckeditor is loading.
When I inspected in firebug it shows me following error


  Error: TypeError: Drupal.settings.ckeditor is undefined Source File:
  localhost/drupal7/sites/all/modules/contrib/ckeditor/includes/ckeditor.utils.js
  Line: 5


I am wondering is there any problem in configuration?

I have installed and configured CKEditor module previously many times but I haven't encountered such type of error
Finally I got a clue. I had enabled HeadJs module for improving jquery loading time. This module was creating bottleneck. Just uninstalled this module and work like a charm.