--- loncom/interface/loncoursedata.pm	2005/11/11 23:23:24	1.151
+++ loncom/interface/loncoursedata.pm	2006/02/05 18:49:47	1.153
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: loncoursedata.pm,v 1.151 2005/11/11 23:23:24 albertel Exp $
+# $Id: loncoursedata.pm,v 1.153 2006/02/05 18:49:47 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1873,6 +1873,9 @@ sub execute_SQL_request {
     my ($dbh,$request)=@_;
 #    &Apache::lonnet::logthis($request);
     my $sth = $dbh->prepare($request);
+    if (!$sth) {
+	die($dbh->errstr . " SQL: $request");
+    }
     $sth->execute();
     my $row = $sth->fetchrow_arrayref();
     if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
@@ -2212,7 +2215,7 @@ sub score_stats {
 #    &Apache::lonnet::logthis('request = '.$/.$request);
     
     $request = 'SELECT SUM(weight) FROM '.$weight_table.
-        ' WHERE ('.$symb_restriction.')';
+        ' AS a WHERE ('.$symb_restriction.')';
     my ($max_possible) = &execute_SQL_request($dbh,$request);
     # &Apache::lonnet::logthis('request = '.$/.$request);
     return($min,$max,$ave,$std,$count,$max_possible);