I want to know how to get a list of tasks associated with a group. I tried to make the filter through the class WorkflowTaskQuery using the following code: WorkflowTaskQuery query = new WorkflowTaskQuery(); Map<QName, Object> filter = new HashMap<QName, Object>(); filter.put(QName.createQName("{http://www.alfresco.org/model/bpm/1.0}pooledActors"), new NodeRef ("workspace://SpacesStore/a6fb5aeb-3612-48ed-950f-d6a74ca0f00d")); query.setProcessCustomProps(filter); (or query.setTaskCustomProps(filter)) List<WorkflowTask> tasks = conAlfresco.getConnection().getAlfrescoCore().getServiceRegistry().getWorkflowService().queryTasks(query); but the list is always empty, how can I do?