How To Fix CNV_20800007 - Old customer &1 (to be converted) does not exist in the system

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20800 - Message class for CNV_20800

• Message number: 007

• Message text: Old customer &1 (to be converted) does not exist in the system

What causes this issue?

The customer number &V1&, which is supposed to be converted, does not
exist in the system. It may represent an interval limit or similar.

How to fix this error?

Check if the value is correct and does not contain any typing errors.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20800007 - Old customer &1 (to be converted) does not exist in the system ?

  The SAP error message CNV_20800007 indicates that during a data conversion process, the system is unable to find an old customer record (identified by the customer number &1) that is supposed to be converted. This error typically arises in the context of data migration or conversion projects, particularly when using SAP's tools for migrating data from legacy systems to SAP S/4HANA or other SAP environments.
  Cause:
  
  
  Missing Customer Record: The most straightforward cause is that the customer record with the specified ID does not exist in the system. This could be due to:
  
  The customer was never created in the system.
  The customer was deleted or archived prior to the conversion process.
  There is a mismatch in the customer ID due to incorrect mapping or data extraction from the legacy system.
  
  
  
  Data Migration Issues: If the data migration process did not correctly extract or load the customer data, this could lead to missing records.
  
  
  Configuration Issues: There may be configuration settings in the migration tool that are not set up correctly, leading to the system looking for records that should not be there.
  
  
  Solution:
  
  
  Verify Customer Existence: Check if the customer ID exists in the system. You can do this by:
  
  Using transaction codes like XD03 (Display Customer) or FD03 (Display Customer - Financial) to search for the customer.
  Running a query on the relevant database tables (e.g., KNA1 for general customer data).
  
  
  
  Check Migration Data: Review the data extraction and transformation processes to ensure that all necessary customer records were included. This may involve:
  
  Checking the source data in the legacy system.
  Ensuring that the mapping of customer IDs from the legacy system to the SAP system is correct.
  
  
  
  Adjust Migration Settings: If the customer should not be converted (for example, if it was intentionally deleted), you may need to adjust the migration settings to exclude this customer from the conversion process.
  
  
  Consult Logs: Review the logs generated during the migration process for additional context or related errors that might provide more insight into why the customer record is missing.
  
  
  Data Correction: If the customer record is indeed missing and should exist, you may need to recreate the customer in the SAP system or correct the data in the legacy system before re-running the migration.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes for customer master data management, such as XD01 (Create Customer), XD02 (Change Customer), and XD03 (Display Customer).
  SAP Notes: Check SAP Notes for any known issues or patches related to the migration tools you are using.
  Documentation: Review the documentation for the specific data migration tool you are using (e.g., SAP S/4HANA Migration Cockpit, SAP Data Services) for best practices and troubleshooting tips.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.