Index: applications/editors/josm/plugins/utilsplugin/src/UtilsPlugin/SimplifyWayAction.java
===================================================================
--- applications/editors/josm/plugins/utilsplugin/src/UtilsPlugin/SimplifyWayAction.java	(revision 17550)
+++ applications/editors/josm/plugins/utilsplugin/src/UtilsPlugin/SimplifyWayAction.java	(revision 17707)
@@ -111,9 +111,9 @@
             backRefsV.visit(wnew.getNode(i));
             boolean used = false;
-            if (backRefsV.data.size() == 1) {
+            if (backRefsV.getData().size() == 1) {
                 used = Collections.frequency(w.getNodes(), wnew.getNode(i)) > 1;
             } else {
-                backRefsV.data.remove(w);
-                used = !backRefsV.data.isEmpty();
+                backRefsV.getData().remove(w);
+                used = !backRefsV.getData().isEmpty();
             }
             if (!used)