Index: trunk/src/org/openstreetmap/josm/tools/RightAndLefthandTraffic.java
===================================================================
--- trunk/src/org/openstreetmap/josm/tools/RightAndLefthandTraffic.java	(revision 11426)
+++ trunk/src/org/openstreetmap/josm/tools/RightAndLefthandTraffic.java	(revision 11427)
@@ -118,4 +118,7 @@
             } catch (UserCancelException ex) {
                 Main.warn(ex);
+            } catch (JosmRuntimeException ex) {
+                // Workaround to #10511 / #14185. To remove when #10511 is solved
+                Main.error(ex);
             }
         }