--- loncom/homework/default_homework.lcpm	2004/10/21 02:43:34	1.91
+++ loncom/homework/default_homework.lcpm	2005/03/28 19:20:54	1.95
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # used by lonxml::xmlparse() as input variable $safeinit to Apache::run::run()
 #
-# $Id: default_homework.lcpm,v 1.91 2004/10/21 02:43:34 albertel Exp $
+# $Id: default_homework.lcpm,v 1.95 2005/03/28 19:20:54 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -163,6 +163,8 @@ sub caparesponse_check {
     elsif ($result == '9') { $result='ANS_CNT_NOT_MATCH'; }
     elsif ($result =='10') { $result='SUB_RECORDED'; }
     elsif ($result =='11') { $result='BAD_FORMULA'; }
+    elsif ($result =='12' && !$response) { $result='MISSING_ANSWER'; }
+    elsif ($result =='12') { $result='WANTED_NUMERIC'; }
     elsif ($result =='13') { $result='UNIT_INVALID_INSTRUCTOR'; }
     elsif ($result =='141') { $result='UNIT_INVALID_STUDENT'; }
     elsif ($result =='142') { $result='UNIT_INVALID_STUDENT'; }
@@ -540,7 +542,7 @@ sub chemparse {
 		$formula .= '⇌ ';
 	    } else {
 		$formula .= &web('<=> ','<m>\ensuremath{\rightleftharpoons}</m> ',
-				 '&lt;=$gt; ');
+				 '&lt;=&gt; ');
 	    }
 	    next;
 	}
@@ -560,7 +562,6 @@ sub chemparse {
     }
     # get rid of trailing space
     $formula =~ s/(\&nbsp\;| )$//;
-    
     return &xmlparse($formula);
 }