* progmodes/octave.el (octave-send-region): Call

compilation-forget-errors.

lisp/ChangeLog

@@ -1,3 +1,8 @@
+2013-10-05  Leo Liu  <sdl.web@gmail.com>
+
+	* progmodes/octave.el (octave-send-region): Call
+	compilation-forget-errors.
+
 2013-10-05  Dmitry Gutov  <dgutov@yandex.ru>
 
 	* progmodes/ruby-mode.el (ruby-mode): Add `ruby-mode-set-encoding'

lisp/progmodes/octave.el

@@ -1471,6 +1471,8 @@ entered without parens)."
         (string (buffer-substring-no-properties beg end))
         line)
     (with-current-buffer inferior-octave-buffer
+      ;; http://lists.gnu.org/archive/html/emacs-devel/2013-10/msg00095.html
+      (compilation-forget-errors)
       (setq inferior-octave-output-list nil)
       (while (not (string-equal string ""))
         (if (string-match "\n" string)