How To Fix CNV_20900020 - Mapping maintenance ignored for vendor numbers

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20900 - Message class for package CNV_20900

• Message number: 020

• Message text: Mapping maintenance ignored for vendor numbers

What causes this issue?

In the activity Specify Mapping Values you have ignored the mapping
maintenance. This means you want to convert the vendor numbers only
based on number range intervals.

How to fix this error?

If you want to maintain the mapping, re-execute the activity Specify
Mapping Values and maintain the mapping accordingly.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20900020 - Mapping maintenance ignored for vendor numbers ?

  The SAP error message CNV_20900020 typically occurs during data migration processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that the mapping maintenance for vendor numbers is being ignored, which can happen for several reasons.
  Cause:
  
  
  Missing Mapping Entries: The error may arise if there are no mapping entries defined for the vendor numbers in the migration cockpit. This means that the system cannot find a corresponding entry for the vendor numbers being processed.
  
  
  Incorrect Configuration: If the configuration settings for the migration process are not set up correctly, it can lead to this error. This includes issues with the mapping tables or the data source.
  
  
  Data Format Issues: The vendor numbers being imported may not match the expected format or structure, leading to the system ignoring the mapping.
  
  
  Incompatibility with Migration Objects: The vendor numbers may not be compatible with the migration objects defined in the migration cockpit.
  
  
  Solution:
  
  
  Check Mapping Entries: Ensure that all necessary mapping entries for vendor numbers are correctly defined in the migration cockpit. You can do this by navigating to the mapping section and verifying that the vendor numbers are correctly mapped.
  
  
  Review Configuration: Double-check the configuration settings for the migration process. Ensure that all relevant settings are correctly configured and that the mapping tables are properly set up.
  
  
  Validate Data Format: Ensure that the vendor numbers being imported conform to the expected format. This may involve checking for leading zeros, special characters, or other formatting issues.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using. There may be specific guidelines or requirements for mapping vendor numbers that need to be followed.
  
  
  Error Logs: Check the error logs for more detailed information about the issue. This can provide insights into what specifically is causing the mapping to be ignored.
  
  
  Testing: If possible, conduct a test migration with a smaller dataset to isolate the issue and verify that the mapping works as expected.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on vendor number mapping during migration.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit, as it often contains troubleshooting tips and best practices for handling common errors.
  
  By following these steps, you should be able to identify the cause of the CNV_20900020 error and implement a solution to resolve it.