Cannot read properties of undefined (reading 'isGeneric')

[mdichkou]

I create customized Tasks in VueJs depends of that example bpmn-js-example-custom-elements and i had that issue Cannot read properties of undefined (reading 'isGeneric') when i want to bpmn.saveXML() any solutions for that

[nikku]

Could you explain the steps to reproduce your issue in a structured and detailed manner? Thanks

For me it looks like miss-use trying to attach extensions to the BPMN 2.0 XML.

[xu.zhang]

I had a problem similar to yours, The error occurs because there is no corresponding definition in moddle, I ended up using a custom moddle file to solve this problem, I don’t know if I can help you：

Add <flowable:taskListener> to the xml

I want add flowable:taskListener tag to the xml. Like this: <userTask id="xxxx" name="submit" flowable:formKey="xxx"> <extensionElements> <flowable:taskListener event="create" delegateExpression="${automaticallyCompleteTasksListener}"></flowable:taskListener> <modeler:initiator-can-complete xmlns:modeler="http://flowable.org/modeler"><![CDATA[false]]></modeler:initiator-can-complete> </extensionElements> </userTask> But I don’t know how to do, I tried to write it this way…

[dhruval_parmar]

hello @mdichkou have you get any solution for

Cannot read properties of undefined (reading ‘isGeneric’)

[philippfromme]

You most likely want to use GitHub - bpmn-io/bpmn-js-example-custom-elements: An example of how to support custom elements in bpmn-js while ensuring BPMN 2.0 compatibility. to create custom elements. You shouldn’t run into this issue then.