--- loncom/interface/statistics/lonproblemanalysis.pm	2002/08/14 20:42:49	1.8
+++ loncom/interface/statistics/lonproblemanalysis.pm	2002/08/14 21:51:51	1.9
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # (Publication Handler
 #
-# $Id: lonproblemanalysis.pm,v 1.8 2002/08/14 20:42:49 stredwic Exp $
+# $Id: lonproblemanalysis.pm,v 1.9 2002/08/14 21:51:51 stredwic Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -115,17 +115,21 @@ sub BuildAnalyzePage {
             splice(@$students, $studentIndex, 1);
         }
     }
-    untie(%cache);
+    unless(untie(%cache)) {
+        $r->print('Can not untie hash.');
+        $r->rflush();
+    }
 
-    if(&Apache::loncoursedata::DownloadStudentCourseDataSeparate($students, 
-                                                                 'true', 
-                                                                 $cacheDB, 
-                                                                 'true', 
-                                                                 'true', 
-                                                                 $courseID, 
-                                                                 $r, 
-                                                                 $c) ne 'OK') {
-        $r->print($Str);
+    my $error = 
+        &Apache::loncoursedata::DownloadStudentCourseDataSeparate($students,
+                                                                  'true',
+                                                                  $cacheDB,
+                                                                  'true', 
+                                                                  'true',
+                                                                  $courseID,
+                                                                  $r, $c);
+    if($error ne 'OK') {
+        $r->print($error.'<br>Error downloading course data<br>');
         return;
     }