Description of problem:

If I attach an error boundary event to a service task, configure it, and run the process, I will get the following exception:

java.lang.IllegalArgumentException : Could not find node to attach to: bpmn20:ServiceTask_1]]

That's because BPMN Designer will generate the following element:

<bpmn2:boundaryEvent id="BoundaryEvent_1" name="Forbidden client error" attachedToRef="bpmn20:ServiceTask_1">

The attribute attachedToRef has to contain only "ServiceTask_1" without the prefix "bpmn20:".

This error can be only fixed manually in XML editor and every change in the process definition requires the fix of attachedToRef attribute.

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