--- loncom/auth/lonacc.pm	2005/01/28 09:30:40	1.60
+++ loncom/auth/lonacc.pm	2005/02/07 23:37:44	1.61
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Cookie Based Access Handler
 #
-# $Id: lonacc.pm,v 1.60 2005/01/28 09:30:40 albertel Exp $
+# $Id: lonacc.pm,v 1.61 2005/02/07 23:37:44 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -145,9 +145,11 @@ sub handler {
                                 "$requrl:bre:1:1:Invalid Access";
   	                return HTTP_NOT_ACCEPTABLE; 
 		    }
-                    my ($map,$mid,$murl)=split(/\_\_\_/,$symb);
-		    &Apache::lonnet::symblist($map,$murl => $mid,
-                                              'last_known' => $murl);
+		    if ($symb) {
+			my ($map,$mid,$murl)=split(/\_\_\_/,$symb);
+			&Apache::lonnet::symblist($map,$murl => $mid,
+						  'last_known' => $murl);
+		    }
                 }
                 $ENV{'request.symb'}=$symb;
                 &Apache::lonnet::courseacclog($symb);