--- loncom/homework/lonmaxima.pm	2007/08/14 21:54:54	1.21
+++ loncom/homework/lonmaxima.pm	2008/06/10 13:31:38	1.22
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Interface routines to MAXIMA CAS
 #
-# $Id: lonmaxima.pm,v 1.21 2007/08/14 21:54:54 riegler Exp $
+# $Id: lonmaxima.pm,v 1.22 2008/06/10 13:31:38 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -139,6 +139,8 @@ sub maxima_check {
     # integer to string mappings come from capaParser.h
     # 1 maps to 'EXACT_ANS'
     if ($reply eq 'true') { return 1; }
+    # 11 maps to 'BAD_FORMULA'
+    if ($reply=~/^Error\:/) { return 11; }
     # 7 maps to 'INCORRECT'
     return 7;
 }