[Logikos]

Jamshed, It looks like your log_cron_action() function was changed. The default vBulletin table is called cronlog. In your error, it is showing up as upload_cronlog.

What is your table_prefix named? You can find the name by opening the /includes/config.php file and looking for:

PHP Code:

$config['Database']['tableprefix'] 


I also need you to post your log_cron_action() function. Open /includes/functions_cron.php and search for:

PHP Code:

function log_cron_action($description, $nextitem) 


Post the code in between the brackets ({}). The default vB function is:

PHP Code:

function log_cron_action($description, $nextitem)
{
    global $vbulletin;

    if (defined('ECHO_CRON_LOG'))
    {
        echo "<p>$description</p>";
    }

    if ($nextitem['loglevel'])
    {
        /*insert query*/
        $vbulletin->db->query_write("
            INSERT INTO " . TABLE_PREFIX . "cronlog
                (cronid, dateline, description)
            VALUES
                ($nextitem[cronid], " . TIMENOW . ", '" . $vbulletin->db->escape_string($description) . "')
        ");
    }
} 


Also, does this happen on all your task managers? Try running another one and let me know if the same thing happens.