How To Fix CNVMBTRFC126 - Destination &1 with version &2 with different system_id (&3 <> &4)

SAP Error Message - Details

• Message type: E = Error

• Message class: CNVMBTRFC - Messages used in RFC Management and its objects

• Message number: 126

• Message text: Destination &1 with version &2 with different system_id (&3 <> &4)

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 CNVMBTRFC126 - Destination &1 with version &2 with different system_id (&3 <> &4) ?

  The SAP error message CNVMBTRFC126 typically occurs in the context of a system conversion or migration process, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there is a mismatch in the system IDs or versions between the source and target systems.
  Cause:
  The error message CNVMBTRFC126 is triggered when:
  
  The destination system (identified by the system ID) is not matching the expected system ID or version that the migration tool is trying to connect to.
  There may be a configuration issue in the RFC (Remote Function Call) destination settings.
  The source and target systems may not be properly aligned in terms of their configurations or versions.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check RFC Destination Configuration:
  
  Go to transaction SM59 in the SAP GUI.
  Verify the RFC destination settings for the target system. Ensure that the system ID and version are correctly configured.
  
  
  
  Verify System IDs:
  
  Ensure that the system ID of the source and target systems are correctly set up and that they match the expected values.
  Check the version of the systems involved to ensure compatibility.
  
  
  
  Check Migration Settings:
  
  Review the migration settings in the Migration Cockpit or the relevant tool you are using. Ensure that the correct source and target systems are selected.
  
  
  
  Update System Information:
  
  If there have been any changes to the system IDs or versions, update the relevant configurations in the migration tool.
  
  
  
  Consult Documentation:
  
  Refer to the official SAP documentation for the migration tool you are using. There may be specific guidelines or prerequisites that need to be followed.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP Support for further assistance. Provide them with the error message details and any relevant logs.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: For managing RFC destinations.
  SICF: For checking and managing HTTP services.
  
  
  
  Migration Cockpit Documentation:
  
  SAP provides extensive documentation on using the Migration Cockpit, which can be helpful in understanding the prerequisites and configurations needed for a successful migration.
  
  
  
  SAP Notes:
  
  Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  
  By following these steps, you should be able to identify and resolve the CNVMBTRFC126 error effectively.