Drupal6: No blog node can be edited - solved

Question

Going to http://www.example.com/node/NID/edit, where NID is any valid nid referring to a node of the story content type, results in the following error:

warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'blog_node_form' was given in /home/site/public_html/site2/includes/form.inc on line 367.

I'm using the standard Drupal blog module.

Editing is impossible. What could this be?

Curiously, the afflicted nodes are listed as type blog in the database, but node_types does not contain any entry about blog.

A bunch of modules were just disabled, then re-enabled. Perhaps that caused a problem?

Answer 1

Solution: Blog module was not enabled. Re-enabling it solves the problem.