diff --git a/RLA/easy_log/exp_loader.py b/RLA/easy_log/exp_loader.py
index ac4806b..a8ee0a6 100644
--- a/RLA/easy_log/exp_loader.py
+++ b/RLA/easy_log/exp_loader.py
@@ -32,8 +32,7 @@ class ExperimentLoader(object):
     def __init__(self):
         self.task_name = exp_manager.hyper_param.get('loaded_task_name', None)
         self.load_date = exp_manager.hyper_param.get('loaded_date', None)
-        self.root = getattr(exp_manager, 'root', None)
-        self.data_root = None
+        self.data_root = getattr(exp_manager, 'root', None)
         pass
 
     def config(self, task_name, record_date, root):
@@ -49,12 +48,12 @@ def is_valid_config(self):
             logger.warn("meet invalid loader config when use it")
             logger.warn("load_date", self.load_date)
             logger.warn("task_name", self.task_name)
-            logger.warn("root", self.root)
+            logger.warn("root", self.data_root)
             return False
 
     def import_hyper_parameters(self, hp_to_overwrite: Optional[list] = None):
         if self.is_valid_config:
-            load_tester = Tester.load_tester(self.load_date, self.task_name, self.root)
+            load_tester = Tester.load_tester(self.load_date, self.task_name, self.data_root)
             target_hp = copy.deepcopy(exp_manager.hyper_param)
             target_hp.update(load_tester.hyper_param)
             if hp_to_overwrite is not None:
@@ -75,7 +74,7 @@ def load_from_record_date(self, var_prefix: Optional[str] = None, variable_list:
         :return:
         """
         if self.is_valid_config:
-            loaded_tester = Tester.load_tester(self.load_date, self.task_name, self.root)
+            loaded_tester = Tester.load_tester(self.load_date, self.task_name, self.data_root)
             # load checkpoint
             load_res = {}
             if var_prefix is not None:
@@ -100,7 +99,7 @@ def fork_log_files(self):
         if self.is_valid_config:
             global exp_manager
             assert isinstance(exp_manager, Tester)
-            loaded_tester = Tester.load_tester(self.load_date, self.task_name, self.root)
+            loaded_tester = Tester.load_tester(self.load_date, self.task_name, self.data_root)
             # copy log file
             exp_manager.log_file_copy(loaded_tester)
             # copy attribute
@@ -109,4 +108,4 @@ def fork_log_files(self):
             exp_manager.private_config = loaded_tester.private_config
 
 
-exp_loader = experimental_loader = ExperimentLoader()
\ No newline at end of file
+exp_loader = experimental_loader = ExperimentLoader()