Stuck at message intermediate event REST

[pvermeil]

Good afternoon everybody.
I struggle with my not-yet-complete understanding of the camunda Rest API. I have a process instance where I’ve completed a task with a 204 ok blank response. Now the thread is at an intermediate message event listener and I have tried two things:

What is described in this topic

Triggering message event via REST API

I’m running the Camunda Process Engine and interacting with it via the REST API. I’m able to deploy process definitions and kick of process instances with no problem. I’ve run thru manual tasks, service tasks, etc. all without issue. However, I’m having problems with the message events. I’ve created a simple workflow with a Start → Message Intermediate Catch Event → End sequence. I kick off the process and can verify in the Cockpit that it’s running and sitting at the message catch event. I the…

aka the execution messageSubscription actions. But I can’t get or trigger any message event subscription with any of the message names present in my .bpmn file.
In the topic above, someone advised an other developper to use a simple “message correlation”, but I can’t get this done.

When performing a /message request I’ve got this error:

{“type”:“RestException”,“message”:“org.camunda.bpm.engine.MismatchingMessageCorrelationException: Cannot correlate message ‘Message_1of3vqw’: No process definition or execution matches the parameters”}

The payload seems to be variable, but I don’t know what is really needed. I initiated my process without business key. I provide the messageRef which is inside the intermediateCatchEvent in the bpmn file. It looks like “Message_0rr46xz”.

My message request returns a 500 http code
I’m starting to think that my BPMN is malformed, but it’s more likely I misunderstood how to move forward with message events. Thanks for your help !

[Niall]

Can you upload your BPMN file?

[pvermeil]

RefundManagement.bpmn (38.0 KB)

[pvermeil]

FYI execution seems stuck here:

[benhoffmann]

Hey @pvermeil,

you have to use the message name instead of the message id in order to deliver the message.

So in your model, the name of that particular message is: Message_0ena99t (should be renamed to something more meaningful), but you tried to correlate with Message_1of3vqw, which is actually the id of the message element in your BPMN file.

Hope that helps.

Cheers, Ben

[pvermeil]

Thanks, I’ll give it a try.