ENGINE-02025 Variable is not from type 'Collection'

Camunda 7 Topics Discussion & Questions
1

Hi,

I am new to Camunda ,and I am trying to implement multiple instance.
I have an issue, I am not able to set the Collection for a multi Instance Task. I got the error
ENGINE-02025 Variable ‘assigneeList’ is not from type ‘Collection’

<bpmn2:userTask id="validation2" name="Validation_2" camunda:assignee="${assigneeInstance}">
  <bpmn2:incoming>SequenceFlow_17n480w</bpmn2:incoming>
  <bpmn2:outgoing>SequenceFlow_1ib9q56</bpmn2:outgoing>
  <bpmn2:multiInstanceLoopCharacteristics camunda:collection="assigneeList" camunda:elementVariable="assigneeInstance">
    <bpmn2:completionCondition xsi:type="bpmn2:tFormalExpression"><![CDATA[${nrOfCompletedInstances/nrOfInstances >= 0.5 }]]></bpmn2:completionCondition>
  </bpmn2:multiInstanceLoopCharacteristics>
</bpmn2:userTask>

The code to generate the

        Collection<String> assigneeList = new ArrayList<String>();
        assigneeList.add("chef1")
        assigneeList.add("chef2")
        assigneeList.add("chef3")
        runtimeService.setVariable(executionId, "assigneeList", assigneeList)

The error message:

ERROR engine.context - ENGINE-16004 Exception while closing command context: ENGINE-02025 Variable ‘assigneeList’ is not from type ‘Collection’.

Need a help.

Regards,

Alioune.

2

Hi @abadiane,

Could you please share the entire stacktrace? When do you add the process variable assigneeList to the process instance before the multi instance task is executed?

Cheers,
Roman

3

Hi Roman,

parallele_gateway_multipleInstances.bpmn (6.8 KB)

Hi Roman,

Please find attached the bpmn.
Now it works perfectly after a full restart. I don’t know what was wrong.
The multi instances parallel tasks are created successfully using the collection below.

        Collection<String> assigneeList = new ArrayList<String>();
        assigneeList.add("chef1")
        assigneeList.add("chef2")
        assigneeList.add("chef3")
        runtimeService.setVariable(executionId, "assigneeList", assigneeList)

Thank you again for your help.

Regards,

Alioune.

4

How can we do this on camunda-external-task-client-js ?