--- ./imaxima.lisp~	2009-02-15 01:55:01.000000000 +0900
+++ ./imaxima.lisp	2010-09-24 18:39:20.000000000 +0900
@@ -142,7 +142,7 @@
     (declare (special *mread-prompt* ))
     (and (consp at) (set-env at))
     (cond ((null at)
-	   ($frame 0 nil)))
+	   (break-frame 0 nil)))
     (catch 'step-continue
       (catch *quit-tag*
 	(unwind-protect