How To Fix XT651 - &1: Backup domain controller of domain &2

SAP Error Message - Details

• Message type: E = Error

• Message class: XT - Transport Management System

• Message number: 651

• Message text: &1: Backup domain controller of domain &2

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.

What else can you do?

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message XT651 - &1: Backup domain controller of domain &2 ?

  The SAP error message XT651 typically indicates an issue related to the backup domain controller (BDC) in a specific domain. This error can arise in various contexts, often related to system configuration, network issues, or problems with the domain controller itself.
  Cause:
  
  Network Issues: There may be connectivity problems between the SAP system and the backup domain controller.
  Configuration Errors: The configuration settings for the domain controller in the SAP system may be incorrect or incomplete.
  Domain Controller Issues: The backup domain controller itself may be down, misconfigured, or experiencing performance issues.
  Authorization Problems: The user or service account used to connect to the domain controller may not have the necessary permissions.
  Replication Issues: If the primary domain controller is not replicating properly with the backup, it can lead to inconsistencies.
  
  Solution:
  
  Check Network Connectivity: Ensure that the SAP system can communicate with the backup domain controller. Use tools like ping or tracert to verify connectivity.
  Review Configuration Settings: Verify the configuration settings in the SAP system for the domain controller. Ensure that the domain name, server name, and other relevant settings are correct.
  Check Domain Controller Status: Ensure that the backup domain controller is operational. You may need to check the server logs or use administrative tools to verify its status.
  Verify User Permissions: Ensure that the user or service account has the necessary permissions to access the backup domain controller.
  Check for Replication Issues: If applicable, check the replication status between the primary and backup domain controllers. Use tools like repadmin to diagnose replication issues.
  Consult SAP Notes: Look for any relevant SAP Notes or documentation that may provide additional guidance or patches related to this error.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for more details on error messages and troubleshooting steps.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  System Logs: Check the SAP system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  
  If the problem persists after trying the above solutions, it may be beneficial to contact SAP support for further assistance.