Index: trunk/src/org/openstreetmap/josm/gui/dialogs/relation/GenericRelationEditor.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/dialogs/relation/GenericRelationEditor.java	(revision 1852)
+++ trunk/src/org/openstreetmap/josm/gui/dialogs/relation/GenericRelationEditor.java	(revision 1853)
@@ -753,5 +753,5 @@
 
         protected void refreshEnabled() {
-            setEnabled(selectionTableModel.getRowCount() > 0);
+            setEnabled(selectionTableModel.getRowCount() > 0 && memberTableModel.getRowCount() > 0);
         }