InfoPath Dev

i want to assign  value to node but  i ' 've  an exception: "The operation is not valid because the current state of the object."

VB and Infopath 2007

code:

Dim sLibelle as String

sLibelle = "EURO" 

MainDataSource.CreateNavigator().SelectSingleNode("/my:mesChamps/my:NOM_MONNAIE", Me.NamespaceManager).SetValue(sLibelle)

Please help! 

What type of function is this code in?  You will not be able to change a node value in a Changing or Validating event.

Hello,

Can you check once the below code first before setting the value to that node,

//Check your node XPath should be correct

Dim mONNAIENode = MainDataSource.CreateNavigator().SelectSingleNode("/my:mesChamps/my:NOM_MONNAIE", Me.NamespaceManager)

If ‘mONNAIENode' node is not null then you can try to set the value,

mONNAIENode.text = sLibelle

 Thanks Jimmy.

before i used  Changing: it is not runing

Now i use Changed: it is runing OK

Thanks you very much