How To Fix CNV_OM_MWBGEN013 - Preselection tables for child tables added

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_OM_MWBGEN - SLO: Messages for Object Based MBW Generation

• Message number: 013

• Message text: Preselection tables for child tables added

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_OM_MWBGEN013 - Preselection tables for child tables added ?

  The SAP error message CNV_OM_MWBGEN013 typically occurs during the data migration process, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that preselection tables for child tables have been added, which may lead to issues in the data migration process.
  Cause:
  The error is generally caused by one of the following reasons:
  
  Missing Preselection Tables: The migration process expects certain preselection tables to be defined for child tables, but they are either missing or not properly configured.
  Data Model Changes: Changes in the data model or structure of the source or target system can lead to discrepancies in the expected preselection tables.
  Configuration Issues: Incorrect configuration in the migration settings or parameters can also trigger this error.
  
  Solution:
  To resolve the CNV_OM_MWBGEN013 error, you can follow these steps:
  
  
  Check Preselection Tables:
  
  Verify that all required preselection tables for the child tables are present and correctly defined in the migration project.
  Ensure that the structure of these tables matches the expected format.
  
  
  
  Review Migration Settings:
  
  Go through the migration settings and parameters to ensure they are correctly configured.
  Make sure that the mapping between source and target tables is correctly set up.
  
  
  
  Update Data Model:
  
  If there have been changes to the data model, ensure that the migration project reflects these changes.
  Update any relevant configurations or mappings to align with the new data model.
  
  
  
  Consult Documentation:
  
  Refer to the official SAP documentation for the migration tool you are using. This may provide insights into the specific requirements for preselection tables.
  
  
  
  Check for Notes and Patches:
  
  Look for any SAP Notes or patches that may address this specific error. Sometimes, SAP releases updates that fix known issues.
  
  
  
  Testing:
  
  After making the necessary adjustments, perform a test migration to see if the error persists.
  
  
  
  Seek Support:
  
  If the issue continues, consider reaching out to SAP support or consulting with an SAP expert who specializes in data migration.
  
  
  
  Related Information:
  
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit, as it provides tools and guidelines for data migration.
  SAP Notes: Regularly check the SAP Support Portal for any relevant notes that may provide additional context or solutions for this error.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered and resolved similar issues.
  
  By following these steps, you should be able to identify the root cause of the CNV_OM_MWBGEN013 error and implement a suitable solution.