Answered converting from SMF to Discuss

$config['smf']['dsn'] = 'mysql:dbname=smf;host=localhost';
$config['smf']['username'] = 'root';
$config['smf']['password'] = '';
$config['smf']['tablePrefix'] = 'smf_';

$config['live'] = true;
$config['import_users'] = true;
$config['import_categories'] = true;
$config['import_private_messages'] = true;
$config['import_ignore_boards'] = true;

$config['default_user_group'] = 'Forum Members';
$config['usergroup_prefix'] = 'Forum ';
$config['attachments_path'] = false;

$modx->resource = $modx->getObject('modResource',236);

[2013-03-07 18:58:04] (WARN @ /core/components/discuss/includes/import.smf.php) `236` was requested but no alias was located.
 [2013-03-07 18:58:06] (INFO @ /core/components/discuss/includes/import.smf.php) Starting import...
[2013-03-07 18:58:06] (INFO @ /core/components/discuss/includes/import.smf.php) Encoding conversion set to: UTF-8 => UTF-8
[2013-03-07 18:58:06] (INFO @ /core/components/discuss/includes/import.smf.php) Migrating Ignore Boards...
[2013-03-07 18:58:06] (INFO @ /core/components/discuss/includes/import.smf.php) Collecting User cache...
[2013-03-07 18:58:06] (INFO @ /core/components/discuss/includes/import.smf.php) 
Execution time: 2,5631 s

$this->log('_mylog: something');

    public function importUserGroups() {
        $stmt = $this->pdo->query('
            SELECT * FROM '.$this->getFullTableName('membergroups').'
            ORDER BY `groupName` ASC
        '.(!$this->config['live'] ? 'LIMIT 10' : ''));
				
        //if (!$stmt) { return 'Failed importUserGroups.'; }
        if (!$stmt) $this->log('_mylog: failed importUserGroups()');

        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {

... 

    public function importUserGroups() {
//        $stmt = $this->pdo->query('
//            SELECT * FROM '.$this->getFullTableName('membergroups').'
//            ORDER BY `groupName` ASC
//        '.(!$this->config['live'] ? 'LIMIT 10' : ''));
		$sql = 'SELECT * FROM '.$this->getFullTableName('membergroups').'ORDER BY `groupName` ASC'.(!$this->config['live'] ? 'LIMIT 10' : '');
		$q = $modx->prepare($sql);
		$q->execute();

//      while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
        while ($row = $q->fetch(PDO::FETCH_ASSOC)) {
...