How To Fix SL404 - Error occurred when determining the active instances

SAP Error Message - Details

• Message type: E = Error

• Message class: SL - System log

• Message number: 404

• Message text: Error occurred when determining the active instances

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 SL404 - Error occurred when determining the active instances ?

  The SAP error message SL404, which states "Error occurred when determining the active instances," typically occurs in the context of SAP Landscape Management (LaMa) or when working with SAP systems that involve multiple instances, such as in a distributed environment. This error can arise due to various reasons, including configuration issues, network problems, or issues with the SAP system itself.
  Causes of SL404 Error
  
  Network Issues: There may be connectivity problems between the SAP system and the database or application servers.
  Configuration Errors: Incorrect configuration settings in the SAP system or in the landscape management tool can lead to this error.
  Instance Availability: The instances you are trying to access may not be running or may be in a state that prevents them from being recognized as active.
  Authorization Issues: The user may not have the necessary permissions to access the instances.
  System Load: High load on the system can sometimes lead to timeouts or failures in instance detection.
  Software Bugs: There may be bugs in the version of SAP you are using that could lead to this error.
  
  Solutions to SL404 Error
  
  Check Network Connectivity: Ensure that all servers in the landscape can communicate with each other. Use tools like ping or telnet to verify connectivity.
  Verify Instance Status: Check the status of the instances in the SAP Management Console (SAP MMC) or using transaction codes like SM51 to ensure they are up and running.
  Review Configuration Settings: Go through the configuration settings in the SAP Landscape Management tool and ensure they are correct. This includes checking the instance profiles and parameters.
  Check User Authorizations: Ensure that the user account being used has the necessary authorizations to access the instances.
  Restart Instances: If instances are not responding, consider restarting them to see if that resolves the issue.
  Check Logs: Review the system logs (transaction SM21) and the developer traces (transaction ST22) for any additional error messages that could provide more context.
  Update SAP Software: If you suspect a bug, check for any available patches or updates for your SAP system that might address this issue.
  Contact SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance.
  
  Related Information
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error.
  Documentation: Review the official SAP documentation for Landscape Management and instance management for best practices and troubleshooting steps.
  Community Forums: Engage with the SAP Community or other forums where SAP professionals discuss similar issues and solutions.
  
  By following these steps, you should be able to diagnose and resolve the SL404 error effectively.