[jboss-user] [jBPM] - How to get data from Multiple-instance subprocess node?

Evgene Ostapenko [https://community.jboss.org/people/taurus] created the discussion "How to get data from Multiple-instance subprocess node?" To view the discussion, visit: https://community.jboss.org/message/725589#725589 -------------------------------------------------------------- I have a Multiple-instance node for which i have specified CollectionExpression and VariableName parameters: CollectionExpression: list VariableName: item After starting a system creates several subproceses. Each of them can access its own element from the collection by using a variable given as VariableName. I pass an Object elements in collection and use such parameter mapping: || *Sub-process variable* || *Process variable* || | username                    | item.username | It works. I can use "username" in the subprocess. But when i tried to return its value to the main process and set a result mapping || *Sub-process variable* || *Process variable* || | username                    | item.username | i get the message at start of the application: There is no ID/IDREF binding for IDREF 'item.username'. After executing a subprocess, exception happens: ould not find variable scope for variable item.username when trying to complete SubProcess node Sub-Process Continuing without setting variable. Could not find variable scope for variable item.outcoming_doc_id when trying to complete SubProcess node Sub-Process Continuing without setting variable. java.lang.NullPointerException           at com.sample.BPMTaskHandler.executeWorkItem(BPMTaskHandler.java:32)           at org.drools.process.instance.impl.DefaultWorkItemManager.internalExecuteWorkItem(DefaultWorkItemManager.java:70)           at org.jbpm.workflow.instance.node.WorkItemNodeInstance.internalTrigger(WorkItemNodeInstance.java:105)           at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:122) How can i write a working result mapping in this case? -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/725589#725589] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]