--- a\heartbeat\views\heartbeat_views.views.inc
+++ b\heartbeat\views\heartbeat_views.views.inc
@@ -218,11 +218,9 @@
     }
 
   }
+  //Fix Undefined property notice when there is no pager
+  if(isset($view->pager['items_per_page'])){
     $view->pager['_items_per_page'] = $view->pager['items_per_page'];
+  }
}
 
 /**
  * Implementation of hook_views_handlers().