How To Fix RT726 - Load balancing; messages about preferred logon instances

SAP Error Message - Details

• Message type: E = Error

• Message class: RT - Monitoring infrastructure MSG and alert texts

• Message number: 726

• Message text: Load balancing; messages about preferred logon 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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message RT726 - Load balancing; messages about preferred logon instances ?

  The SAP error message RT726 typically relates to issues with load balancing in an SAP system, specifically concerning preferred logon instances. This error can occur when the SAP system is unable to direct a user to their preferred application server instance due to various reasons.
  Cause:
  
  Instance Availability: The preferred instance may be down or not available for some reason (e.g., maintenance, crash).
  Configuration Issues: The SAP system may not be properly configured to recognize the preferred instance.
  Network Issues: There may be network connectivity problems preventing access to the preferred instance.
  Load Balancer Configuration: If a load balancer is used, it may not be configured correctly to route requests to the preferred instance.
  User Profile Settings: The user profile may not have the correct settings for preferred logon instances.
  
  Solution:
  
  Check Instance Status: Verify that the preferred application server instance is up and running. You can do this by checking the SAP Management Console (SAP MC) or using transaction codes like SM51 to see the status of application servers.
  Review Configuration: Ensure that the instance is correctly configured in the SAP system. Check the instance profile and the load balancing settings in the SAP system.
  Network Troubleshooting: Investigate any network issues that may be preventing access to the preferred instance. This may involve checking firewalls, routing, and connectivity.
  Load Balancer Settings: If a load balancer is in use, review its configuration to ensure it is correctly set up to handle requests for the preferred instance.
  User Profile: Check the user profile settings in transaction SU01 to ensure that the preferred logon instance is correctly specified.
  SAP Notes: Look for relevant SAP Notes that may address this specific error. SAP frequently updates its knowledge base with solutions for known issues.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for load balancing and instance management for more detailed guidance.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM51 (to view instances), SMLG (to manage logon groups), and RZ10 (to manage instance profiles).
  
  By following these steps, you should be able to diagnose and resolve the RT726 error related to load balancing and preferred logon instances in your SAP environment.