diff --git a/library/Businessprocess/Node.php b/library/Businessprocess/Node.php
index 0691491..21f4ada 100644
--- a/library/Businessprocess/Node.php
+++ b/library/Businessprocess/Node.php
@@ -263,6 +263,9 @@ abstract class Node
         return ' ';
     }
 
+    public function toLegacyConfigString() { return '';}
+    //abstract public function toLegacyConfigString();
+
     public function __toString()
     {
         return $this->name;