None of the GEL-based or flow-based processes are showing the message flag with details on the process completion.
This is due to an additional configuration change needed in 15.3 or higher to see additional messaging types for processes as referenced in the 'New CSA Setting for Error Logging' in the CA PPM 15.3 Change Impact and Upgrade documentation:
A new CSA setting allows you to configure the level of logging that you want to see for process GEL scripts using <gel:log>. As a default, only errors or fatal logs are persisted in the BPM_ERRORS table. Accordingly, only error messages appear on the user interface. Messages that are not logged in BPM_ERRORS are not visible. You can change the default setting to allow logs for warnings and other informational messages so they also appear.
Release : Clarity PPM 15.3 and higher
Component : CA PPM BUSINESS PROCESS MANAGEMENT
For better performance, we recommend you keep the error logging at error. If you do want to see the message flag for completed processes, update Process Engine Persistence Log Level to Info in Log Configuration. Steps below:
7. Save the changes
Note: You can also access the log configuration page from the Clarity application by replacing everything in the clarity url after action: with security.logs