--- loncom/homework/default_homework.lcpm	2010/10/18 19:47:31	1.150
+++ loncom/homework/default_homework.lcpm	2010/12/16 16:01:01	1.151
@@ -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 1.150 2010/10/18 19:47:31 raeburn Exp $
+# $Id: default_homework.lcpm,v 1.151 2010/12/16 16:01:01 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -359,11 +359,25 @@ sub caparesponse_check_list {
 
     my $allow_control_char = 0;
     my $control_chars_removed = 0;
+    my $ansstring;
     if ($type eq 'cs' || $type eq 'ci') {
         if (ref($LONCAPA::CAPAresponse_answer->{'answers'}) eq 'ARRAY') {
             foreach my $strans (@{$LONCAPA::CAPAresponse_answer->{'answers'}}) {
-                if ($strans =~ /[\000-\037]/) {
-                    $allow_control_char = 1;
+                if (ref($strans) eq 'ARRAY') {
+                    foreach my $item (@{$strans}) {  
+                        if ($item =~ /[\000-\037]/) {
+                            $allow_control_char = 1;
+                        }
+                    }
+                }
+            }
+        }
+    }
+    if (($type eq 'cs') || ($type eq 'ci')) {
+        if (ref($LONCAPA::CAPAresponse_answer->{'answers'}) eq 'ARRAY') {
+            foreach my $answer (@{ $LONCAPA::CAPAresponse_answer->{'answers'} }) {
+                if (ref($answer) eq 'ARRAY') {
+                    $ansstring = join("\0",@{$answer});
                 }
             }
         }
@@ -476,7 +490,7 @@ sub caparesponse_check_list {
     &LONCAPA_INTERNAL_DEBUG(" all final_awards ".join(':',@final_awards));
     my ($final_award,$final_msg) = 
 	&LONCAPA_INTERNAL_FINALIZEAWARDS(\@final_awards,\@final_msg,undef,1);
-    return ($final_award,$final_msg,$error,$control_chars_removed);
+    return ($final_award,$final_msg,$error,$control_chars_removed,$ansstring);
 }
 
 sub verify_stringresponse {