Back Button on browser error: An unexpected error occurred. Further details are available in the logfiles

Products

• CA Automic Workload Automation - Automation Engine
• CA Automic One Automation
• Automic SaaS

Issue/Introduction

When using the browser's back button within the Automic Web Interface (AWI) after navigating from or within the Process Monitoring perspective while the Hierarchy view is used, users encounter an "An unexpected error occurred. Further details are available in the logfiles." popup message. This interrupts navigation and requires an extra step to close the error, impacting productivity.

Symptoms:

User Interface: A popup message stating: "An unexpected error occurred. Further details are available in the logfiles."
AWI Logs: One of the following (or similar) messages may be observed:

WARN [...] AEPROD:100/AUTOMIC/AUTOMATION [...] WorkflowMonitorContentController] - Unable to find subMediator [runid] of -1 

(where [runid] is a numerical identifier, often corresponding to the run ID of the monitored workflow).

ERROR [...] java.lang.NullPointerException: Cannot invoke "com.uc4.ecc.components.listitems.api.IListItem.getIdentifier()" because "item" is null 

(often accompanied by a longer stack trace originating from V14BaseComboPickerWrapper.renderItems or related UI rendering components).

This only impacts users who are using the Hierarchical view in Process Monitoring when using the Back Button

Environment

AWI: 24.4.1 and earlier

Cause

This is a known issue

Resolution

This is planned to be fixed in release 24.4.2 (currently planned by October of 2025).  Please check back on this knowledge article regularly for updates.