diff -r 3e2aebc9c7c0 -r 3e7bd88fcff7 ConfigTreeNode.py
--- a/ConfigTreeNode.py	Tue May 28 10:03:41 2013 +0200
+++ b/ConfigTreeNode.py	Tue May 28 17:52:07 2013 +0200
@@ -150,8 +150,10 @@
         parts = path.split(".", 1)
         if self.MandatoryParams and parts[0] == self.MandatoryParams[0]:
             self.MandatoryParams[1].setElementValue(parts[1], value)
+            value = self.MandatoryParams[1].getElementInfos(parts[0], parts[1])["value"]
         elif self.CTNParams and parts[0] == self.CTNParams[0]:
             self.CTNParams[1].setElementValue(parts[1], value)
+            value = self.CTNParams[1].getElementInfos(parts[0], parts[1])["value"]
         return value, False
 
     def CTNMakeDir(self):