Check the Enable Event Placeholder Step checkbox in the Setup Information section of Conga Orchestrate Setup. This setting creates the sub_type__c field.
When a process step is an event placeholder, Conga Orchestrate waits for an event with a matching sub-type to be created before child step(s) can execute.
To configure event sub-types:
In Setup, enter Activity Custom Fields in the Quick Find.
Select Activity Custom Fields.
Select the Sub Type field label.
Click Edit next to a sub type value.
Enter the sub-type label and API name and click Save.
Repeat for all needed sub-types.
Click the Deactivate link next to any value not in use. t-event-sub-types edit-event-sub-types