BPM: Conatiner variables can not be selected

Hi SDNners,

I had configured a very simple BPM process, witha reciever, sender and a trasnformation. I have also created the abstract message interfaces, and corresponding container elements. However, in each of the steps, ex. sender, I am unable to select one of the container variables. When i select the icon in

Properties->Message, the hour glass comes up, and it stays on (probably hours), and does not show me the pop-up to select a variable.

I am on XI3.0 SP14. Wondering if anyone had faced this problem, and if it is a bug.

Please let me know if you had observed this problem, and what you did to resolve it.

Thanks

Feroz