I want to log my details for log my application event. So i have changed config.php as follows.
$config['log_threshold'] = 4;
$config['log_path'] = 'application/logs/main';
$config['log_date_format'] = 'Y-m-d H:i:s';
I use it in my controller as like this.
log_message('error', 'Some variable did not contain a value.');
I grant write permission to main file. bt it is not working. What is the issue.