Try googling “mysql errno: 130″ and you will find many solutions to you problem.

http://www.google.com/#hl=it&q=mysql+errno%3A+130

erors on page:
WordPress database error Can’t open file: ‘wp_kf_most_read.MYI’ (errno: 130) for query SELECT count(mr.post_ID) as totHits, p.ID, p.post_title from wp_posts p JOIN wp_kf_most_read mr on mr.post_ID = p.ID where mr.hit_ts >= ‘1266373956′ GROUP BY mr.post_ID order by totHits desc, ID ASC LIMIT 5 made by require, require_once, include, get_sidebar, locate_template, load_template, require_once, dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, PHP_Code_Widget->widget, eval, kf_get_posts_by_hits WordPress database error Can’t open file: ‘wp_kf_most_read.MYI’ (errno: 130) for query SELECT count(mr.post_ID) as totHits, p.ID, p.post_title from wp_posts p JOIN wp_kf_most_read mr on mr.post_ID = p.ID where mr.hit_ts >= ‘1265855556′ GROUP BY mr.post_ID order by totHits desc, ID ASC LIMIT 5 made by require, require_once, include, get_sidebar, locate_template, load_template, require_once, dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, PHP_Code_Widget->widget, eval, kf_get_posts_by_hits WordPress database error Can’t open file: ‘wp_kf_most_read.MYI’ (errno: 130) for query SELECT count(mr.post_ID) as totHits, p.ID, p.post_title from wp_posts p JOIN wp_kf_most_read mr on mr.post_ID = p.ID where mr.hit_ts >= ‘1263868356′ GROUP BY mr.post_ID order by totHits desc, ID ASC LIMIT 5 made by require, require_once, include, get_sidebar, locate_template, load_template, require_once, dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, PHP_Code_Widget->widget, eval, kf_get_posts_by_hits

I think I was getting the session_start() error because I was testing it offline (locally)… Once I uploaded it, the problem disappeared.

However, the function doesn’t seem to be getting any result. The output is always empty.

Am I missing something?

Cheers!

session_start() [function.session-start]: open(..\..\php5\temp\sess_lnrg6r3s67782n4qd2bssgm477, O_RDWR) failed: No such file or directory (2) in …\wp-content\plugins\kf-most-read\kf_most_read.php on line 29

Why is this?

echo ‘‘.$post['Title'].’ (‘.$p->totHits.’)’.chr(13);

In the function “kf_register_post_hits” you referred to the variable “$post_id” without ever setting it. A simple “$post_id = $post->ID” (line 5 of the pasted code) will do it:

function kf_register_post_hits(&$the_content){
global $post, $wpdb;
if(($post->post_status == ‘publish’) && (int)$post->ID){
if(!empty($_SESSION)){
$post_id = $post->ID;
if(is_single() && !in_array($post_id, $_SESSION['kf_session_manager']['kf_most_read']['posts'])){
$_SESSION['kf_session_manager']['kf_most_read']['posts'][] = $post_id;
$sql= “INSERT INTO {$wpdb->prefix}kf_most_read(post_ID, hit_ts) values(‘$post_id’,”.time().”);\n”;
$wpdb->query($sql);
}
}
else{
$_SESSION['kf_session_manager']['kf_most_read']['posts'] = array();
}
}
return $the_content;
}

I hope you will fix it in future releases.

Thanks,
Basti

thanks for your advice. We are planning to release a new version of the plugin as soon as possible. We will include a widget and make some general improvements including a dynamic table name for the sql that creates the table.