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?