Index: /applications/editors/josm/plugins/seachart/src/s57/S57val.java
===================================================================
--- /applications/editors/josm/plugins/seachart/src/s57/S57val.java	(revision 31607)
+++ /applications/editors/josm/plugins/seachart/src/s57/S57val.java	(revision 31608)
@@ -1179,5 +1179,6 @@
 					if (!str.isEmpty())
 						str += ";";
-					str += ((S57enum) map.get(item)).val;
+					if (item != null)
+						str += ((S57enum) map.get(item)).val;
 				}
 				return str;