--- loncom/interface/spreadsheet/studentcalc.pm	2003/07/16 15:57:32	1.14
+++ loncom/interface/spreadsheet/studentcalc.pm	2003/07/16 20:30:36	1.15
@@ -1,5 +1,5 @@
 #
-# $Id: studentcalc.pm,v 1.14 2003/07/16 15:57:32 matthew Exp $
+# $Id: studentcalc.pm,v 1.15 2003/07/16 20:30:36 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -615,6 +615,8 @@ sub export_data {
     my $self = shift;
     my $student = $self->{'name'}.':'.$self->{'domain'};
     if (! exists($Exportrows{$student}) ||
+        ! defined($Exportrows{$student}) ||
+        ! defined($Exportrows{$student}->{'data'}) ||
         ! $self->check_expiration_time($Exportrows{$student}->{'time'})) {
         $self->compute();
     }