To start a process execution engine:
In the left pane of the Process Administrator, select Engines.
On the Engines page, click the Start button associated with the engine.
At the top of the Engines page, the Message(s) section should contain the following confirmation message:
The engine has been started.
After starting the process execution engine, the engine Status should display as Ready. The status change may take a few seconds. If the change is still not visible after a few seconds and the Message(s) section does not contain error messages, use the Refresh Status option at the top of the page until the engine status displays as Ready.