--- a/gwt-client/src/main/java/org/dive4elements/river/client/client/ui/uinfo/VegetationzonesTableEditPanel.java	Wed Jul 25 11:33:48 2018 +0200
+++ b/gwt-client/src/main/java/org/dive4elements/river/client/client/ui/uinfo/VegetationzonesTableEditPanel.java	Wed Jul 25 14:42:44 2018 +0200
@@ -16,6 +16,7 @@
 import com.google.gwt.event.dom.client.ClickHandler;
 import com.google.gwt.user.client.ui.Button;
 import com.smartgwt.client.util.SC;
+import com.smartgwt.client.widgets.Canvas;
 import com.smartgwt.client.widgets.form.DynamicForm;
 import com.smartgwt.client.widgets.form.fields.ColorItem;
 import com.smartgwt.client.widgets.form.fields.TextItem;
@@ -82,7 +83,7 @@
                 r.setAttribute("to", v2);
                 r.setAttribute("color", v4);
                 elements.addData(r);
-                validateRangeOverlap();
+                updateValidationMsgLabel();
                 final String sortField = elements.getSortField();
                 if (sortField != null) {
                     elements.toggleSort(sortField);
@@ -92,11 +93,14 @@
         });
 
         fields.addMember(form1);
-
         root.addMember(fields);
         root.addMember(PanelHelper.getSpacer(10));
         root.addMember(add);
+    }
 
+    @Override
+    protected Canvas createHelper(final DataList data) {
+        return null;
     }
 
 }
\ No newline at end of file