Unable to proceed with data migration

Hi I tried with 2.0.7 and may I know what is this error regarding
 
{ 2395 foreach($table->primaryKey as $name) 2396 { 2397 if(isset($table->columns[$name]))
 
The table “{{eav_attribute_set}}” for active record class “Mage1AttributeSet” cannot be found in the database.

/srv/users/serverpilot/apps/mage207/public/pub/ub-tool/yii/db/ar/CActiveRecord.php(2385)

2373 
2374     /**
2375      * Constructor.
2376      * @param CActiveRecord $model the model instance
2377      * @throws CDbException if specified table for active record class cannot be found in the database
2378      */
2379     public function __construct($model)
2380     {
2381         $this->_modelClassName=get_class($model);
2382 
2383         $tableName=$model->tableName();
2384         if(($table=$model->getDbConnection()->getSchema()->getTable($tableName))===null)
2385             throw new CDbException(Yii::t('yii','The table "{table}" for active record class "{class}" cannot be found in the database.',
2386                 array('{class}'=>$this->_modelClassName,'{table}'=>$tableName)));
2387                 
2388         if(($modelPk=$model->primaryKey())!==null || $table->primaryKey===null)
2389         {
2390             $table->primaryKey=$modelPk;
2391             if(is_string($table->primaryKey) && isset($table->columns[$table->primaryKey]))
2392                 $table->columns[$table->primaryKey]->isPrimaryKey=true;
2393             elseif(is_array($table->primaryKey))
2394             {
2395                 foreach($table->primaryKey as $name)
2396                 {
2397                     if(isset($table->columns[$name]))