How To Fix 0T051 - System &1 may not supply itself

SAP Error Message - Details

• Message type: E = Error

• Message class: 0T - WBO Configuration Editor / SE06

• Message number: 051

• Message text: System &1 may not supply itself

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 0T051 - System &1 may not supply itself ?

  The SAP error message 0T051 with the description "System &1 may not supply itself" typically occurs in the context of system landscape configuration, particularly when dealing with system connections and RFC (Remote Function Call) destinations.
  Cause:
  This error usually arises when a system is trying to connect to itself in a way that is not allowed or configured correctly. It can happen in scenarios such as:
  
  Self-Referencing RFC Destination: The system is configured to connect to itself, which is not permitted.
  Incorrect Configuration: The RFC destination or logical system configuration may be incorrect, leading to a situation where the system believes it is trying to connect to itself.
  Transport Management System (TMS) Issues: If the system is part of a transport domain, there may be issues with the configuration of the transport routes.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check RFC Destinations:
  
  Go to transaction SM59 (RFC Destinations).
  Look for any RFC destination that points to the same system (e.g., the same client and host).
  If you find such a destination, either delete it or modify it to point to a different system.
  
  
  
  Review Logical System Configuration:
  
  Go to transaction SALE (Logical System Configuration).
  Ensure that the logical system name is unique and does not point to itself inappropriately.
  
  
  
  Transport Management System (TMS) Configuration:
  
  If the system is part of a transport domain, check the TMS configuration using transaction STMS.
  Ensure that the transport routes are correctly set up and that the system is not trying to transport to itself.
  
  
  
  Check System Parameters:
  
  Review the system parameters in transaction RZ10 to ensure that there are no settings that might cause self-referencing.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: Manage RFC Destinations
  SALE: Logical System Configuration
  STMS: Transport Management System
  RZ10: Profile Parameter Maintenance
  
  
  
  Documentation: Refer to SAP Help documentation for more details on RFC connections and system landscape configuration.
  
  
  SAP Community: You can also search for discussions or similar issues in the SAP Community forums, where other users may have shared their experiences and solutions.
  
  
  By following these steps, you should be able to identify and resolve the cause of the error message 0T051 in your SAP system.