diff --git a/main_package/classes/utility/json_importer.py b/main_package/classes/utility/json_importer.py
index 6e3288f..b75a1e5 100644
--- a/main_package/classes/utility/json_importer.py
+++ b/main_package/classes/utility/json_importer.py
@@ -32,7 +32,7 @@ class JsonImporter(ai.AbstractImporter):
     """
 
     def __init__(self, file_path: str, samples_label: str, structure_label: str, variables_label: str, time_key: str,
-                 variables_key: str):
+                 variables_key: str, network_number:int=0):
         self.samples_label = samples_label
         self.structure_label = structure_label
         self.variables_label = variables_label
@@ -43,6 +43,7 @@ class JsonImporter(ai.AbstractImporter):
         self._df_variables = pd.DataFrame()
         self._concatenated_samples = None
         self.sorter = None
+        self.network_number= network_number
         super(JsonImporter, self).__init__(file_path)
 
     def import_data(self):
@@ -68,7 +69,7 @@ class JsonImporter(ai.AbstractImporter):
         Returns:
             void
         """
-        self.normalize_trajectories(raw_data, 0, self.samples_label)
+        self.normalize_trajectories(raw_data, self.network_number, self.samples_label)
 
     def import_structure(self, raw_data: typing.List):
         """
@@ -79,7 +80,7 @@ class JsonImporter(ai.AbstractImporter):
         Returns:
             void
         """
-        self._df_structure = self.one_level_normalizing(raw_data, 0, self.structure_label)
+        self._df_structure = self.one_level_normalizing(raw_data, self.network_number, self.structure_label)
 
 
     def import_variables(self, raw_data: typing.List, sorter: typing.List):
@@ -93,7 +94,7 @@ class JsonImporter(ai.AbstractImporter):
         Returns:
             void
         """
-        self._df_variables = self.one_level_normalizing(raw_data, 0, self.variables_label)
+        self._df_variables = self.one_level_normalizing(raw_data, self.network_number, self.variables_label)
         #self.sorter = self._df_variables[self.variables_key].to_list()
         #self.sorter.sort()
         #print("Sorter:", self.sorter)
diff --git a/main_package/tests/optimizers/test_tabu_search.py b/main_package/tests/optimizers/test_tabu_search.py
index 8431fc8..39140e0 100644
--- a/main_package/tests/optimizers/test_tabu_search.py
+++ b/main_package/tests/optimizers/test_tabu_search.py
@@ -23,7 +23,8 @@ class TestTabuSearch(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
         #cls.read_files = glob.glob(os.path.join('../../data', "*.json"))
-        cls.importer = ji.JsonImporter("../../data/networks_and_trajectories_binary_data_20.json", 'samples', 'dyn.str', 'variables', 'Time', 'Name')
+        cls.importer = ji.JsonImporter("../../data/networks_and_trajectories_binary_data_01_5.json", 
+                                    'samples', 'dyn.str', 'variables', 'Time', 'Name', 6 )
         cls.s1 = sp.SamplePath(cls.importer)
         cls.s1.build_trajectories()
         cls.s1.build_structure()
@@ -37,9 +38,9 @@ class TestTabuSearch(unittest.TestCase):
         se1 = se.StructureScoreBasedEstimator(self.s1)
         edges = se1.estimate_structure(
                             max_parents = None,
-                            iterations_number = 30,
+                            iterations_number = 100,
                             patience = None,
-                            tabu_length = 17,
+                            tabu_length = 20,
                             tabu_rules_duration = 20,
                             optimizer = 'tabu'
                             )