How To Fix CNV_20800142 - Mapping not maintained for old customer number : &1

CNV_20800142 - Overview

• Message type: E = Error

• Message class: CNV_20800 - Message class for CNV_20800

• Message number: 142

• Message text: Mapping not maintained for old customer number : &1

Self-Explanatory Message

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CNV_20800142 - Details

• The SAP error message CNV_20800142 indicates that there is a mapping issue related to an old customer number in the context of a data migration or conversion process. This error typically arises during the execution of a data migration project, particularly when using SAP's Customer Migration tools or similar functionalities.
  
  Cause:
  The error occurs when the system encounters an old customer number for which there is no corresponding mapping defined in the migration or conversion settings. This can happen for several reasons:
  
  Missing Mapping Entries: The mapping table that links old customer numbers to new customer numbers does not contain an entry for the specified old customer number.
  Data Inconsistencies: There may be inconsistencies in the data being migrated, such as missing or incorrectly formatted customer numbers.
  
  Configuration Issues: The migration configuration may not have been set up correctly, leading to missing mappings.
  
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Mapping Table:
  
  Verify the