How To Fix XT638 - Backup domain controller &1 not completely activated

SAP Error Message - Details

• Message type: E = Error

• Message class: XT - Transport Management System

• Message number: 638

• Message text: Backup domain controller &1 not completely 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 XT638 - Backup domain controller &1 not completely activated ?

  The SAP error message XT638 indicates that a backup domain controller (BDC) is not completely activated. This can occur in a system landscape where multiple application servers are involved, particularly in a distributed environment. Here’s a breakdown of the cause, potential solutions, and related information for this error:
  Cause:
  
  Network Issues: There may be network connectivity problems between the primary domain controller and the backup domain controller.
  Configuration Issues: The BDC may not be properly configured in the system settings, leading to incomplete activation.
  System Load: High system load or resource constraints can prevent the BDC from activating fully.
  Database Issues: Problems with the database or inconsistencies in the data can also lead to this error.
  Transport Layer Issues: Issues with the transport layer or communication protocols can hinder the activation process.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there are no network issues between the primary and backup domain controllers. Use tools like ping or traceroute to verify connectivity.
  Review Configuration: Check the configuration settings for the BDC in the SAP system. Ensure that all necessary parameters are correctly set.
  Monitor System Load: Use transaction codes like ST03N or SM66 to monitor system performance and load. If the system is under heavy load, consider optimizing performance or scheduling tasks during off-peak hours.
  Database Consistency Check: Run database consistency checks to ensure that there are no issues with the database that could affect the BDC activation.
  Restart the BDC: Sometimes, simply restarting the backup domain controller can resolve activation issues.
  Check Logs: Review the system logs (transaction SM21) for any related error messages that could provide more context on the issue.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide patches and updates.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for detailed information on system architecture and BDC configuration.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Support Tickets: If the issue persists, consider opening a support ticket with SAP for further assistance.
  
  By following these steps, you should be able to diagnose and resolve the issue related to the XT638 error message in your SAP environment.