Two additional hints were added to the ZDU documentation Upgrade Process
Article ID: 84928
CA Automic Workload Automation - Automation Engine
Error Message : U00011898 Switch server mode to DWP not allowed during Zero Downtime Upgrade.
The following two hints were missing in the overview section of the Zero Downtime Upgrade (ZDU) documentation:
While you are in compatibility mode, you are not allowed to switch a Worker Process (WP) to a Dialog Process (DWP).
When an Automation Engine process running the old version stops, it cannot be restarted. When all Automation Engine processes running the old version have stopped (e.g. because of a power failure), the ZDU finalizes the upgrade process. No rollback is possible in this case.
OS Version: N/A
Cause type: Other Root Cause: N/A
Update to a fix version listed below or a newer version if available. where the above two hints are now included in the overview section of the ZDU documentation.