If the Tree View element is the application itself:
Was an action descriptor defined in the Get Root Containers attribute of the application options?
If the Tree View element is an element of a modeled element type:
Was an action descriptor defined in the Get Children attribute of the corresponding element type?
“Refresh” the Tree View element that is not expanding:
Explanation: The Application Workflow Manager caches Tree View information. If the expand fails because of an incorrect model,
an empty list is cached.