hi, Horst.
I got it now.
I had to bind the my custom Query node with the Data List.
And then there is no more error.
Am I right?
But there is still one more problem.
This is not for the OVS.
businessobject customBO{
element id:ID;
element name:Name;
node item[1,n]{
element itemID:ID;
element itemName:Name;
}
When I created my custom Query of my customBO, I chose root as Parent Node.
When I bound the query Overview with the data list of the datamodal in OWL, I couldn't bind for the item nodes because the Overview node did not contain item node.
Regards,
May T.