diff --git a/QDS.py b/QDS.py
index a160b4e..4f6ec29 100755
--- a/QDS.py
+++ b/QDS.py
@@ -276,7 +276,7 @@ class AppWindow(QMainWindow):
         #self.ui.graphicsView.removeItem(self.PowerComplex.data_curve_real)
         self.function_registry.unregister_function(self.PowerComplex)
 
-        self.PowerComplex = None
+        #self.PowerComplex = None
         self.updatePlot()