system/selections.py

@@ -139,7 +139,7 @@ class DimListController:
                 values = (selection.title, selection, dataset.get_dim_name(0))
                 self.selstore.insert_after(i, None, values)
 
-    def selection_changed(self, selection):
+    def selection_changed(self, dim_name, selection):
         """Callback function from Project."""
 
         for dim in selection.dims():