The engine stops at some point if you leave the unload tool open (graphically) after unloading, i.e. after a transport case has been unloaded by using ucybdbun program.
Release 21.0.9
Component: Automic Workload Automation
Bug
Workaround:
Close the tool opened graphically, the engine cleans itself up again.
Fix version:
Component(s): Automic Workload Automation
Automation.Engine - 21.0.11 released
Automation.Engine - 24.1.0 released