Is there a rest api from which i can see which task is completed and which task is pending for one single flow
You can use the History /task endpoint and filter based on the process instance ID to find the completed tasks. You will not be able to see “pending” in the sense of “possible tasks”, but you can see tasks that are active but not completed. It is not possible to get a list of tasks that are “not active and not completed” without manual parsing of the BPMN file.
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