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标题
Core Web UI agent and replication windows are not responding with message “Object reference not set to an instance of an object” -
说明
When opening the Core console and selecting a determined agent, the summary Windows is not displayed and the message “Object reference not set to an instance of an object” is displayed, same message appears when opening the Replication tab. -
原因
This problem may be caused by an agent key in the registry causing the tabs not to open and report the error “Object reference not set to an instance of an object”. -
解决办法
Windows Registry Disclaimer:
Quest does not provide support for problems that arise from improper modification of the registry. The Windows registry contains information critical to your computer and applications. Make sure you back up the registry before modifying it. For more information on the Windows Registry Editor and how to back up and restore it, refer to Microsoft Article ID 256986 “Description of the Microsoft Windows registry” at Microsoft Support.
To resolve this issue the invalid agent key must be removed from the registry by following these steps:
- Stop the core service gracefully. (Please follow the steps in this article to ensure the core is stopped gracefully)
- Open regedit
- Browse to HKEY_LOCAL_MACHIN\SOFTWARE\AppRecovery\Agent
- In this folder you will find multiple hives each named with a unique GUID. Browse through each of these hives to find the hive with the key titled DisplayName that is the same as the agent name generated in the error message you received.
- Make a backup of the entire registry hive for that agent.
- Delete the agent hive that was generating the error
- Start the core service
The agent that was causing the issue will no longer appear in the core console and is no longer protected or replicated. If this agent should be protected, please add it back to protection and replication.