How To Fix XT637 - Backup domain controller activated

SAP Error Message - Details

• Message type: E = Error

• Message class: XT - Transport Management System

• Message number: 637

• Message text: Backup domain controller activated

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 XT637 - Backup domain controller activated ?

  The SAP error message XT637 indicates that a backup domain controller (BDC) has been activated. This message typically arises in the context of SAP systems that are configured in a distributed environment, where multiple application servers or instances are involved.
  Cause:
  The error message XT637 is generally triggered when:
  
  BDC Activation: A backup domain controller has been activated in the system landscape. This can happen during system maintenance, upgrades, or configuration changes.
  Configuration Issues: There may be issues with the configuration of the domain controllers or the way they are communicating with the central instance.
  Network Issues: Network connectivity problems between the application servers and the database or between the BDC and the primary domain controller can also lead to this message.
  
  Solution:
  To resolve the XT637 error, you can take the following steps:
  
  
  Check System Configuration:
  
  Ensure that the BDC is correctly configured in the SAP system. Verify the settings in transaction SICF and SMD to ensure that the BDC is properly set up.
  
  
  
  Review Logs:
  
  Check the system logs (transaction SM21) and the developer traces (transaction ST22) for any additional error messages or warnings that could provide more context about the issue.
  
  
  
  Network Connectivity:
  
  Verify the network connectivity between the BDC and the primary domain controller. Ensure that there are no firewall rules or network issues preventing communication.
  
  
  
  Restart Services:
  
  Sometimes, simply restarting the affected services or the entire SAP system can resolve temporary issues related to BDC activation.
  
  
  
  Consult Documentation:
  
  Refer to SAP Notes and documentation related to BDC configuration and management. SAP Notes may provide specific guidance or patches that address known issues.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above steps, consider reaching out to SAP Support for further assistance. They can provide more detailed troubleshooting based on your specific system configuration.
  
  
  
  Related Information:
  
  SAP Notes: Check for relevant SAP Notes that may address this specific error or provide updates and patches.
  System Landscape: Understanding your system landscape (e.g., whether you are using a Central Instance, Application Servers, etc.) can help in diagnosing the issue.
  Backup and Recovery: Ensure that you have a backup and recovery plan in place, especially when making changes to domain controllers or system configurations.
  
  By following these steps, you should be able to diagnose and resolve the XT637 error in your SAP environment.