After adding a Termination Wait activity you must associate it with a Process Creation activity. The Process Creation activity must be located previous to the Termination Wait activity in the process flow, and must have the Keep relation with child process property selected.
For more information about Process Creation activities, see Process Creation Activity.
You should add Termination Wait activities in automatic role lanes. You can add Termination Wait activities in user-defined roles but this does not add any information to the process. The engine runs Termination Wait activities without the user's intervention.
You must connect a Termination Wait activity to the process flow using an inbound and an outbound transition. An error appears in the Problems View if the inbound or outbound transitions are missing.
You may need to define an argument mapping when the subprocess has output arguments.