Index: trunk/src/org/openstreetmap/josm/actions/OpenFileAction.java
===================================================================
--- trunk/src/org/openstreetmap/josm/actions/OpenFileAction.java	(revision 9706)
+++ trunk/src/org/openstreetmap/josm/actions/OpenFileAction.java	(revision 9707)
@@ -177,5 +177,7 @@
         @Override
         protected void finish() {
-            Main.map.repaint();
+            if (Main.map != null) {
+                Main.map.repaint();
+            }
         }