Custom Post types giving 404

Question

Now I know this has been covered quite a lot, but I've read previous fixes on here and haven't had any luck.

Basically my custom post types for questions are giving me 404 errors.

So far I've tried the following:

• Setting the permalinks to default, then changing them back again.
• Adding flush_rewrite_rules just before the register_post_type.
• I've checked and there are no pages and posts with the same name.
• Deleted and recreated the htaccess file.
• adding 'rewrite' => array( 'slug' => 'question','with_front' => FALSE)
• creating a custom permalink structure.

Code is below:

add_action( 'init', 'irt_questions_create' );

function irt_questions_create() {

$labels = array(
    'name' => _x('Questions', 'post type general name', 'your_text_domain'),
    'singular_name' => _x('Question', 'post type singular name', 'your_text_domain'),
    'add_new' => _x('Add New', 'Question', 'your_text_domain'),
    'add_new_item' => __('Add New Question', 'your_text_domain'),
    'edit_item' => __('Edit Question', 'your_text_domain'),
    'new_item' => __('New Question', 'your_text_domain'),
    'all_items' => __('All Questions', 'your_text_domain'),
    'view_item' => __('View Question', 'your_text_domain'),
    'search_items' => __('Search Questions', 'your_text_domain'),
    'not_found' =>  __('No Questions found', 'your_text_domain'),
    'not_found_in_trash' => __('No Questions found in Trash', 'your_text_domain'), 
    'parent_item_colon' => '',
    'menu_name' => __('Questions', 'your_text_domain')
);

$args = array(
    'labels' => $labels,
    'public' => true,
    'publicly_queryable' => true,
    'show_ui' => true, 
    'show_in_menu' => true, 
    'query_var' => true,
    'rewrite' => array( 'slug' => _x( 'module', 'URL slug', 'your_text_domain' ) ),
    'capability_type' => 'post',
    'has_archive' => true, 
    'hierarchical' => true,
    'menu_position' => 106,
    'supports' => array( 'title', 'editor', /*'author',*/ 'thumbnail', /*'excerpt', 'comments', 'custom-fields', 'revisions',*/ 'page-attributes')
);
register_post_type('question', $args);

}

Answer 1

After 3 days of trying to fix this I found out it was 'hierarchical' => true giving me the error.

As soon as I removed this line of code and then refreshed the permalinks by Setting the permalinks to default, then changing them back again problem fixed.