Index: applications/editors/josm/plugins/utilsplugin/src/UtilsPlugin/JoinAreasAction.java
===================================================================
--- applications/editors/josm/plugins/utilsplugin/src/UtilsPlugin/JoinAreasAction.java	(revision 18387)
+++ applications/editors/josm/plugins/utilsplugin/src/UtilsPlugin/JoinAreasAction.java	(revision 18415)
@@ -443,5 +443,5 @@
     private ArrayList<RelationRole> removeFromRelations(OsmPrimitive osm) {
         ArrayList<RelationRole> result = new ArrayList<RelationRole>();
-        for (Relation r : Main.main.getCurrentDataSet().relations) {
+        for (Relation r : Main.main.getCurrentDataSet().getRelations()) {
             if (r.isDeleted() || r.incomplete) continue;
             for (RelationMember rm : r.getMembers()) {