You need to remove the “/Inventory.WorkOrder” part in your xpath.
It needs to look like this:
[Inventory.WorkOrderParts_WorkOrder = ‘[%CurrentObject%]’]
You can’t compare the CurrentObject to the object in xpath, you need to compare it to the association itself. That should solve your problem.
Try to match it with one level before like below.
Inventory.WorkOrderParts_WordOrder = '[%CurrentObject%]'
Also you must have a dataview above your list view to use the currentobject.
If you are having a page, you could pass the page parameter and use that for dataview. And with in dataview, you could use list view and currentobject.