Index: src/org/openstreetmap/josm/actions/DownloadAction.java
===================================================================
--- src/org/openstreetmap/josm/actions/DownloadAction.java	(revision 82)
+++ src/org/openstreetmap/josm/actions/DownloadAction.java	(revision 83)
@@ -72,4 +72,6 @@
 	    public void realRun() throws IOException, SAXException {
     		dataSet = reader.parseOsm();
+    		if (dataSet == null)
+    			return;
     		if (dataSet.nodes.isEmpty())
     			JOptionPane.showMessageDialog(Main.main, "No data imported.");