diff --git a/module/programplan/model.php b/module/programplan/model.php
index 80bc48c081..74967df009 100755
--- a/module/programplan/model.php
+++ b/module/programplan/model.php
@@ -1043,10 +1043,12 @@ class programplanModel extends model
             /* If child plans has milestone, update parent plan set milestone eq 0 . */
             if($parentID and $milestone) $this->dao->update(TABLE_PROJECT)->set('milestone')->eq(0)->where('id')->eq($parentID)->exec();
 
-            if(dao::isError()) return print(js::error(dao::getError()));
+            if(dao::isError()) return (bool)print(js::error(dao::getError()));
 
             next($orders);
         }
+
+        return true;
     }
 
     /**