--- loncom/homework/randomlabel.pm	2004/02/23 23:25:39	1.59
+++ loncom/homework/randomlabel.pm	2004/03/12 21:01:14	1.60
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # random labelling tool
 #
-# $Id: randomlabel.pm,v 1.59 2004/02/23 23:25:39 albertel Exp $
+# $Id: randomlabel.pm,v 1.60 2004/03/12 21:01:14 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -87,7 +87,7 @@ sub start_randomlabel {
     my $result='';
     push (@Apache::lonxml::namespace,'randomlabel');
     my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
-    if ( $bgimg !~ /^http:/ ) {
+    if ( defined($bgimg) && $bgimg !~ /^http:/ ) {
 	$bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
 	if (&Apache::lonnet::repcopy($bgimg) ne OK) {
 	    $bgimg='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';