How To Fix LMON011 - Alert Monitor cannot start: tree variant doesn't include root alert class

LMON011 - Overview

• Message type: E = Error

• Message class: LMON - Monitor messages

• Message number: 011

• Message text: Alert Monitor cannot start: tree variant doesn't include root alert class

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message LMON011 - Alert Monitor cannot start: tree variant doesn't include root alert class ?

  The SAP error message LMON011 indicates that the Alert Monitor cannot start because the tree variant does not include the root alert class. This typically occurs in the context of SAP's Alert Monitoring functionality, which is part of the Landscape Management Database (LMDB) and is used to monitor system alerts and performance.
  
  Cause:
  The error is usually caused by one of the following issues:
  
  Missing Root Alert Class: The tree variant that is being used for the Alert Monitor does not include the root alert class, which is necessary for the monitor to function correctly.
  
  Configuration Issues: There may be a misconfiguration in the alert monitoring settings or the tree variant settings.
  System Updates or Changes: Recent changes or updates to the system may have affected the configuration of the alert classes or the tree variant.
  
  
  Solution:
  To resolve the LMON011 error, you can follow these steps:
  
  
  Check Tree Variant Configuration:
  
  Go to the transaction code LMON (Alert Monitor).
  Check