diff --git a/toolkit.py b/toolkit.py
index e4aa349316485534867e09e9af37c8f7123f6477..d124ef919d911dd95e9dd7bfadd28dab09e3b40d 100755
--- a/toolkit.py
+++ b/toolkit.py
@@ -1656,6 +1656,8 @@ class ClassificationProjectDataFrame(ClassificationProject):
             self._w_test = None
             self._w_train_tot = None
 
+        self.data_loaded = True
+
         if not self.data_transformed:
             self._transform_data()