How To Fix CNV_20900138 - No mapping for renaming vendor numbers has been maintained

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20900 - Message class for package CNV_20900

• Message number: 138

• Message text: No mapping for renaming vendor numbers has been maintained

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20900138 - No mapping for renaming vendor numbers has been maintained ?

  The SAP error message CNV_20900138 indicates that there is no mapping defined for renaming vendor numbers during a data migration or conversion process. This error typically arises in the context of using SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other data conversion tools.
  Cause:
  The error occurs when the system attempts to rename vendor numbers as part of a data migration process, but it cannot find the necessary mapping information. This can happen for several reasons:
  
  Missing Mapping Entries: The mapping table that should contain the old and new vendor numbers is either empty or not properly configured.
  Incorrect Configuration: The configuration settings for the migration process may not have been set up correctly, leading to the absence of the required mappings.
  Data Preparation Issues: The source data may not have been prepared correctly, or the vendor numbers may not match the expected format.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Mapping Table:
  
  Go to the relevant transaction or tool where the mapping is defined (e.g., transaction code LTMC for Migration Cockpit).
  Verify that the mapping for vendor numbers is correctly maintained. Ensure that both old and new vendor numbers are present.
  
  
  
  Maintain Mapping:
  
  If the mapping is missing, you will need to create the necessary entries. This typically involves specifying the old vendor number and the corresponding new vendor number that it should be mapped to.
  
  
  
  Review Configuration:
  
  Check the configuration settings for the migration process to ensure that they are set up correctly. This may involve reviewing the migration project settings or the specific data migration object.
  
  
  
  Data Validation:
  
  Validate the source data to ensure that the vendor numbers are in the correct format and match the expected values. This may involve cleaning or transforming the data before migration.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or guides related to the specific migration tool you are using. There may be specific instructions or prerequisites for maintaining vendor number mappings.
  
  
  
  Testing:
  
  After making the necessary changes, perform a test run of the migration process to ensure that the error is resolved and that the vendor numbers are being renamed correctly.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or fixes related to this error message.
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its functionalities, as it is commonly used for data migration tasks.
  Data Migration Best Practices: Review best practices for data migration in SAP, including data cleansing, mapping, and validation processes.
  
  If the issue persists after following these steps, consider reaching out to SAP support or consulting with an SAP expert for further assistance.