Yii::setPathOfAlias('bootstrap', dirname(__FILE__).'/../extensions/bootstrap');

'modules'=>array(
    'admin',
    'consultant'=>array(
        'preload'=>array('bootstrap'),
        'components'>array(
            'bootstrap'=>array(
                'class'=>'bootstrap.theme.abound'
            ),
        ),
    ),
    'candidate',
),

class ConsultantModule extends CWebModule
{
    public function init()
    {
        $this->setImport(array(
            'consultant.models.*',
            'consultant.components.*',
        ));

        Yii::app()->getComponent('bootstrap');
    }
}

mainFolder
  protected
    config
      **main.php**
    extensions
      bootstrap
        assets
        components
        form
        gii
        theme
          **abound**
        widgets
    modules
      consultant
        controllers
        models
        views
      **ConsultantModule.php**

Property "ConsultantModule.0" is not defined.