--- loncom/homework/grades.pm	2004/10/07 22:12:47	1.220
+++ loncom/homework/grades.pm	2004/10/14 20:39:34	1.221
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # The LON-CAPA Grading handler
 #
-# $Id: grades.pm,v 1.220 2004/10/07 22:12:47 albertel Exp $
+# $Id: grades.pm,v 1.221 2004/10/14 20:39:34 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -4460,7 +4460,8 @@ sub scantron_validate_CODE {
 						 $scan_data);
 	my $CODE=$$scan_record{'scantron.CODE'};
 	my $error=0;
-	if (!exists($allcodes{$CODE}) && !$$scan_record{'scantron.useCODE'}) {
+	if (%allcodes && !exists($allcodes{$CODE}) 
+	    && !$$scan_record{'scantron.useCODE'}) {
 	    &scantron_get_correction($r,$i,$scan_record,
 				     \%scantron_config,
 				     $line,'incorrectCODE',\%allcodes);