childActivityInstances empty for "activityType": "callActivity",

Camunda 7 Topics Discussion & Questions
1

HI All,

I have a process(A) with callActivity and this call activity successfully called another process(B) but I need to get information of process(B) using processInstanceId of process(A).
I have tried by rest /process-instance/aProcessInstanceId/activity-instances but no use.
And some how achieved using superProcessInstance in https://docs.camunda.org/manual/7.5/reference/rest/process-instance/get-query

Is there any better way to achieve this?

Also anybody know what is the use of childActivityInstances in /process-instance/aProcessInstanceId/activity-instances in this response?
And why is empty for calllActivity?
GET /process-instance/{id}/activity-instances

2

Sounds like a good general direction.

The activity-instances endpoint returns all activity instance of a single process instance. A call activity creates a separate process instance.