--- a/my-log-mode.el	Wed Feb 09 15:17:21 2011 +0200
+++ b/my-log-mode.el	Wed Feb 09 15:19:48 2011 +0200
@@ -38,7 +38,10 @@
        (goto-line fline)
       )
      ( t
-       (message "File '%s' is not found (default directory is '%s')." fname default-directory)
+       (if fname
+           (message "File '%s' is not found (default directory is '%s')." fname default-directory)
+         (message "No file under current line.")
+         )
        )
      )
     ))