Index: /applications/editors/josm/plugins/opendata/src/org/openstreetmap/josm/plugins/opendata/core/io/tabular/CsvImporter.java
===================================================================
--- /applications/editors/josm/plugins/opendata/src/org/openstreetmap/josm/plugins/opendata/core/io/tabular/CsvImporter.java	(revision 33039)
+++ /applications/editors/josm/plugins/opendata/src/org/openstreetmap/josm/plugins/opendata/core/io/tabular/CsvImporter.java	(revision 33040)
@@ -35,5 +35,5 @@
         try {
             return CsvReader.parseDataSet(in, handler, instance);
-        } catch (IOException e) {
+        } catch (IOException | IllegalArgumentException e) {
             throw new IllegalDataException(e);
         }