How To Fix DMC_GENERAL026 - This sender structure is already selected as secondary access relation

SAP Error Message - Details

• Message type: E = Error

• Message class: DMC_GENERAL - MWB: General Messages

• Message number: 026

• Message text: This sender structure is already selected as secondary access relation

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_GENERAL026 - This sender structure is already selected as secondary access relation ?

  The SAP error message DMC_GENERAL026 indicates that a sender structure has already been selected as a secondary access relation in the context of Data Migration Cockpit (DMC) or similar data management processes. This typically occurs when you are trying to set up a data migration scenario and the system detects that the sender structure you are trying to use is already associated with another access relation.
  Cause:
  
  Duplicate Selection: The sender structure you are trying to use has already been defined in the system as a secondary access relation for another migration object or scenario.
  Configuration Error: There may be a misconfiguration in the data migration setup where the same sender structure is being referenced multiple times incorrectly.
  Data Model Constraints: The data model may have constraints that prevent the same structure from being used in multiple contexts simultaneously.
  
  Solution:
  
  Check Existing Configurations: Review the existing configurations in the Data Migration Cockpit to see where the sender structure is already being used. You can do this by navigating to the relevant migration object and checking its access relations.
  Remove or Modify Existing Access Relation: If the sender structure is not needed in the existing context, consider removing or modifying that access relation to free it up for your current use case.
  Use a Different Structure: If the sender structure is required in its current context, consider using a different sender structure for your new migration scenario.
  Consult Documentation: Refer to SAP documentation or notes related to the Data Migration Cockpit for any specific guidelines or limitations regarding sender structures and access relations.
  Contact SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance, especially if this is impacting critical migration activities.
  
  Related Information:
  
  Data Migration Cockpit (DMC): A tool used for data migration in SAP systems, allowing users to transfer data from legacy systems to SAP S/4HANA or other SAP solutions.
  Access Relations: These define how data is accessed and transformed during the migration process, and they can include sender and receiver structures.
  SAP Notes and Knowledge Base Articles: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.