How To Fix CNV_20800138 - No mapping maintained for renaming customer numbers

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20800 - Message class for CNV_20800

• Message number: 138

• Message text: No mapping maintained for renaming customer numbers

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20800138 - No mapping maintained for renaming customer numbers ?

  The SAP error message CNV_20800138 indicates that there is no mapping maintained for renaming customer numbers during a data migration or conversion process. This error typically arises in the context of SAP's data migration tools, particularly when using the SAP S/4HANA Migration Cockpit or similar tools that involve data transformation.
  Cause:
  The error occurs when the system attempts to rename or map customer numbers from the source system to the target system, but it cannot find a corresponding mapping entry. This can happen due to several reasons:
  
  Missing Mapping Entries: The mapping table that should contain the old and new customer numbers is either incomplete or not populated.
  Incorrect Configuration: The configuration settings for the migration process may not have been set up correctly, leading to the absence of necessary mappings.
  Data Integrity Issues: There may be inconsistencies or issues in the source data that prevent proper mapping.
  
  Solution:
  To resolve the error, you can follow these steps:
  
  
  Check Mapping Table:
  
  Verify that the mapping table for customer numbers is correctly populated. This table should contain the old customer numbers from the source system and their corresponding new customer numbers in the target system.
  If the mapping is missing, you will need to create or update the mapping entries.
  
  
  
  Review Migration Configuration:
  
  Ensure that the migration configuration is set up correctly. Check the settings related to customer number mapping and ensure that they point to the correct mapping table.
  
  
  
  Data Validation:
  
  Validate the source data to ensure that all customer numbers that need to be mapped are present and correctly formatted. Look for any discrepancies or missing entries.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation related to the specific migration tool you are using. There may be specific guidelines or prerequisites for maintaining customer number mappings.
  
  
  
  Use Transaction Codes:
  
  If applicable, use transaction codes like LTMC (for Migration Cockpit) or LTMOM (for Migration Object Modeler) to manage and review the migration objects and mappings.
  
  
  
  Seek Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support or consulting with an SAP expert who can provide more tailored assistance based on your specific system configuration and migration scenario.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its functionalities, as it provides tools for data migration and mapping.
  Data Migration Best Practices: Review best practices for data migration in SAP environments to ensure a smooth transition and avoid common pitfalls.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.