Error starting event subprocess inside embedded Subprocess

Camunda 7 Topics Discussion & Questions
1

Hi,

Here is my model:

image
image1206×522 20.8 KB

That seems correct to me :slight_smile:

But when I’m trying to throw message event to run event subprocess I receive error:

org.camunda.bpm.engine.ProcessEngineException:
Error while evaluating expression: ${execution.getProcessEngineServices()
.getRuntimeService()
.correlateMessage("Message_task3starter", variables)}. 

Cause: org.camunda.bpm.engine.MismatchingMessageCorrelationException: 
Cannot correlate message 'Message_task3starter': 
No process definition or execution matches the parameters

Is that model feasible at all and what might be wrong with correlation if so?

regards

–leo

2
  • Message start events are only supported in top-level processes. Message start events are not supported in embedded sub processes.
3

I thought that means that it is not allowed to use message as a start point of embedded subprocess per se.

4

Hi @Leonid_Toporkov,

your process model is correct. You can use a non-interrupting event based subprocess starting wit a message event.

Where do you do the message correlation?

In BPMN it is not allowed to correlate a message to the same process instance, although the Camunda process engine is not as restrictive as the BPMN 2.0 specification.

Cheers, Ingo

5

@Ingo_Richtsmeier

Thanks, here is real part of diagram, it’s a bit more complicated, but still very simple:

Screenshot 2023-02-13 at 16.05.34
Screenshot 2023-02-13 at 16.05.342012×904 60.9 KB

we use Expression as a correlation implementation at Message Throw Event:

<bpmn:messageEventDefinition id="MessageEventDefinition_1gnm5dd" 
messageRef="Message_2fjued0" 
camunda:expression="${execution.getProcessEngineServices()
.getRuntimeService()
.correlateMessage(&#34;Message_sendEmail&#34;, variables)}" />
6

Hi @Leonid_Toporkov,

you have to check the Asynchronous before box on both message send events in the process model.

Otherwise, the message receive event is not persisted in the database when you send the message to it.

Hope this helps, Ingo

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7