--- loncom/interface/lonsearchcat.pm	2005/12/29 19:45:19	1.250
+++ loncom/interface/lonsearchcat.pm	2006/02/05 20:56:57	1.251
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Search Catalog
 #
-# $Id: lonsearchcat.pm,v 1.250 2005/12/29 19:45:19 www Exp $
+# $Id: lonsearchcat.pm,v 1.251 2006/02/05 20:56:57 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1542,8 +1542,10 @@ sub parse_advanced_search {
     ## 
     my ($libraries_to_query,$pretty_domains_string,$domain_sql_restriction) = 
         &parse_domain_restrictions();
-    push(@queries,$domain_sql_restriction);
-    $pretty_search_string .= $pretty_domains_string."<br />\n";
+    if ((defined($domain_sql_restriction)) && ($domain_sql_restriction ne '')) {
+       push(@queries,$domain_sql_restriction);
+       $pretty_search_string .= $pretty_domains_string."<br />\n";
+    }
     #
     if (@queries) {
 	$query="SELECT * FROM metadata WHERE (".join(") AND (",@queries).')';