--- a/gwt-client/src/main/java/org/dive4elements/river/client/client/ui/UIProviderFactory.java	Thu Jul 19 16:37:04 2018 +0200
+++ b/gwt-client/src/main/java/org/dive4elements/river/client/client/ui/UIProviderFactory.java	Thu Jul 19 17:32:27 2018 +0200
@@ -142,7 +142,11 @@
             return new FixEventSelect();
         } else if (uiProvider.equals("fix.preprocessing_panel")) {
             return new BooleanPanel();
-        } else if (uiProvider.equals("fix.functionselect")) {
+        } else if (uiProvider.equals("fix.missing_volume_panel")) {
+            return new BooleanPanel();
+        }
+
+        else if (uiProvider.equals("fix.functionselect")) {
             return new FixFunctionSelect();
         } else if (uiProvider.equals("period_select")) {
             return new PeriodPanel();