Hi Martin
I am not sure if I am correct (my UWL XML experience is limited + old and even worst is my WD exposure) ..... What I gather from the above XML is that you are calling the Task TS90100041 which calls the IView... is that right?
What method are you calling in that task? Is it custom? If yes, can you pass _Workitem.WorkitemId from the task to the method in Binding (as a new importing parameter to the method)?
Regards,
Modak