Root Cause: A recursive call of ACTIVATE_UC_OBJECT can lead to an endless loop in the Automation Engine.
Update to a fix version listed below or a newer version if available where a script that activates itself recursively is canceled because it would be interlaced too much.
Hotfix-Description: ACTIVATE_UC_OBJECT allows recursive activation
Behavior has been improved where a recursive call of ACTIVATE_UC_OBJECT lead to an endless loop in the automation engine. Now after an activation depth of 16, the activation is cancelled same as for workflow depth.
Fix Status: In Progress
Automation Engine 12.2.0 - Planned release date: 2018-06-19
Automation Engine 12.1.1 - Available
Automation Engine 12.0.4 - Available
Automation Engine 11.2.7 - Available