How To Fix CNV_MBT521 - &1: member &2 of group &3 has no selref field!

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT - PCL message class

• Message number: 521

• Message text: &1: member &2 of group &3 has no selref field!

For the given conversion object and selection group_id, member_id there
is no selection field maintained. Please remove this object from
reduction. For further assistance please contact SAP support.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_MBT521 - &1: member &2 of group &3 has no selref field! ?

  The SAP error message CNV_MBT521 typically occurs during data migration processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that a specific member of a group does not have a selection reference (selref) field defined, which is necessary for the migration process to function correctly.
  Cause:
  
  Missing Selection Reference Field: The member specified in the error message does not have a corresponding selection reference field defined in the data structure. This can happen if the data model is not correctly configured or if there are inconsistencies in the data mapping.
  Incorrect Configuration: The configuration of the migration object may be incomplete or incorrect, leading to missing fields that are required for the migration.
  Data Model Changes: If there have been changes to the data model or the migration object after the initial setup, it may lead to discrepancies that result in this error.
  
  Solution:
  
  Check Data Model Configuration: Review the configuration of the migration object to ensure that all necessary fields, including the selection reference fields, are defined correctly.
  Update Migration Object: If the migration object has been modified, ensure that all members of the group have the required fields. You may need to regenerate or update the migration object.
  Consult Documentation: Refer to the SAP documentation for the specific migration object you are using to ensure that you are following the correct procedures and that all required fields are included.
  Data Mapping Review: Check the data mapping to ensure that all fields are correctly mapped and that there are no missing references.
  Contact SAP Support: If the issue persists after checking the above points, consider reaching out to SAP support for further assistance. They may provide insights specific to your system configuration or the migration process you are using.
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like LTMC (for Migration Cockpit) or LTMOM (for Migration Object Modeler) to review and adjust your migration settings.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on data migration issues.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues and can share their solutions.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.