@@ -1322,12 +1322,12 @@ class DotWidget(gtk.DrawingArea):

         try:

             self.set_xdotcode(xdotcode)

         except ParseError, ex:

-            error_dlg = gtk.MessageDialog(type=gtk.MESSAGE_ERROR,

-                                          message_format=str(ex),

-                                          buttons=gtk.BUTTONS_OK)

-            error_dlg.set_title('Dot Viewer')

-            error_dlg.run()

-            error_dlg.destroy()

+            dialog = gtk.MessageDialog(type=gtk.MESSAGE_ERROR,

+                                       message_format=str(ex),

+                                       buttons=gtk.BUTTONS_OK)

+            dialog.set_title('Dot Viewer')

+            dialog.run()

+            dialog.destroy()

             return False

         else:

             return True

@@ -1643,9 +1643,13 @@ class DotWindow(gtk.Window):

             fp = file(filename, 'rt')

             self.set_dotcode(fp.read(), filename)

             fp.close()

-        except IOError:

-            # TODO: show an error message

-            pass

+        except IOError, ex:

+            dlg = gtk.MessageDialog(type=gtk.MESSAGE_ERROR,

+                                    message_format=str(ex),

+                                    buttons=gtk.BUTTONS_OK)

+            dlg.set_title('Dot Viewer')

+            dlg.run()

+            dlg.destroy()

     def on_open(self, action):

         chooser = gtk.FileChooserDialog(title="Open dot File",