Am also facing the same issue.
I am trying to update the Goxam diagram by changing the values in the Model that is bind to the diagram. Here is my code in the view model
var node = GoXamModel.FindNodeByKey("key1");
var oldLocation = node.Location;
node.Location = new Point(10, 20);
GoXamModel.RaisePropertyChanged("Location", node, oldLocation, node.Location);
Here GoXamModel is an object of class
public class CustomModel : GraphLinksModel
When I debug my code after executing the CommitTransaction("PropertyChanged") the GoXamModel has all the updated values but they are not getting reflected in the UI.
Is there any method to Refresh the UI?
Thanks in advance