function print_error ($errorcode, $module='', $link='', $a=NULL) {

    global $CFG;

    if (empty($module) || $module == 'moodle' || $module == 'core') {
        $module = 'error';
        $modulelink = 'moodle';
    } else {
        $modulelink = $module;
    }

    if (!empty($CFG->errordocroot)) {
        $errordocroot = $CFG->errordocroot;
    } else if (!empty($CFG->docroot)) {
        $errordocroot = $CFG->docroot;
    } else {
        $errordocroot = 'http://docs.moodle.org';
    }

    $lang = get_record('config', 'name', 'lang'); //getting the configurated language from the database
    echo $lang = substr($lang->value,0,2); //truncating the string
    if(!fopen($errordocroot.'/'.$lang.'/error/'.$modulelink.'/'.$errorcode)) $lang = 'en'; //if the document doesn't exists redirect to the english documentation
    
    $message = '<p class="errormessage">'.get_string($errorcode, $module, $a).'</p>'.
               '<p class="errorcode">'.
               '<a href="'.$errordocroot.'/'.$lang.'/error/'.$modulelink.'/'.$errorcode.'">'.
                 get_string('moreinformation').'</a></p>';
    error($message, $link);
}