Feature plot issue

nexus/nexus.py

@@ -1236,7 +1236,11 @@ class ChannelWidget(WidgetBase, *load_ui("ChannelWidget.ui")):
     def setSelection(self, current, old):
         super().setSelection(current, old)
         try:
-            self.uiPlotResponseButton.disconnect()
+            # There is difference between Python and C++ version of disconnect
+            # In order to make sure that the disconnect function is executed
+            # correctly, Three arguments are needed to be passed to disconnect
+            # function.
+            self.uiPlotResponseButton.disconnect(None, None, None)
         except TypeError:
             pass
         node = current.internalPointer()