1 files changed, 13 insertions, 6 deletions
diff --git a/admin/element_set.php b/admin/element_set.php
index 530bbd5f5..ee9884e31 100644
--- a/admin/element_set.php
+++ b/admin/element_set.php
@@ -147,20 +147,27 @@ SELECT id
 ;';
   $virtual_categories = array_from_query($query, 'id');
 
-  $query = '
+  if (!empty($virtual_categories))
+  {
+    $query = '
 SELECT DISTINCT(image_id)
   FROM '.IMAGE_CATEGORY_TABLE.'
 ;';
-  $all_elements = array_from_query($query, 'image_id');
-  
-  $query = '
+    $all_elements = array_from_query($query, 'image_id');
+
+    $query = '
 SELECT DISTINCT(image_id)
   FROM '.IMAGE_CATEGORY_TABLE.'
   WHERE category_id IN ('.implode(',', $virtual_categories).')
 ;';
-  $linked_to_virtual = array_from_query($query, 'image_id');
+    $linked_to_virtual = array_from_query($query, 'image_id');
 
-  $page['cat_elements_id'] = array_diff($all_elements, $linked_to_virtual);
+    $page['cat_elements_id'] = array_diff($all_elements, $linked_to_virtual);
+  }
+  else
+  {
+    $page['cat_elements_id'] = array();
+  }
 }
 else if ('duplicates' == $_GET['cat'])
 {