Index: /applications/editors/josm/plugins/roadsigns/src/org/openstreetmap/josm/plugins/roadsigns/RoadSignInputDialog.java
===================================================================
--- /applications/editors/josm/plugins/roadsigns/src/org/openstreetmap/josm/plugins/roadsigns/RoadSignInputDialog.java	(revision 33178)
+++ /applications/editors/josm/plugins/roadsigns/src/org/openstreetmap/josm/plugins/roadsigns/RoadSignInputDialog.java	(revision 33179)
@@ -198,5 +198,5 @@
             multiSplitPane.getMultiSplitLayout().setModel(model);
             multiSplitPane.getMultiSplitLayout().setFloatingDividers(false);
-        } catch (IOException ex) {
+        } catch (IOException | ArrayIndexOutOfBoundsException ex) {
             // (COLUMN
             //    (ROW weight=0.3 (LEAF name=upperleft weight=1.0) upperright)