Index: trunk/DataStoreServer/scripts/dsprodindex
===================================================================
--- trunk/DataStoreServer/scripts/dsprodindex	(revision 23876)
+++ trunk/DataStoreServer/scripts/dsprodindex	(revision 23901)
@@ -118,5 +118,5 @@
     for (my $i = 0; $i < $numRows; $i++) {
         my $val = $col->[$i];
-        if (!$val) {
+        if (!defined($val)) {
             die "value for column $c in row $i is null";
             next;
@@ -134,5 +134,5 @@
         my $val = $column[$c]->[$r];
         my $width = $col_widths[$c];
-        if ($val) {
+        if (defined($val)) {
             printf "%-*s|", $width, $val;
         } else {