How To Fix CNV20200499 - Table CNV_20200_SNAP is already filled for package &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20200 - Messages for development class CNV_20200

• Message number: 499

• Message text: Table CNV_20200_SNAP is already filled for package &1

What causes this issue?

Table CNV_20200_SNAP is already filled for package &V1&.

System Response

Information.

How to fix this error?

Table CNV_20200_SNAP is left unchanged.

Procedure for System Administrators

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 CNV20200499 - Table CNV_20200_SNAP is already filled for package &1 ?

  The SAP error message CNV20200499, which states that "Table CNV_20200_SNAP is already filled for package &1," typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that the system has detected that the specified table (CNV_20200_SNAP) has already been populated with data for the given package, and it is not allowing duplicate entries.
  Cause:
  
  Duplicate Execution: The most common cause of this error is that the migration or conversion process is being executed multiple times for the same package without clearing the previous entries.
  Incomplete Rollback: If a previous migration attempt was interrupted or failed, it might have left the table populated, leading to this error on subsequent attempts.
  Configuration Issues: There may be issues with the configuration of the migration package or the data mapping that could lead to this error.
  
  Solution:
  
  Check Existing Data: Before running the migration again, check the contents of the CNV_20200_SNAP table to see what data is already present. You can do this using transaction SE11 or SE16.
  Clear the Table: If you determine that the data in the CNV_20200_SNAP table is no longer needed, you can clear the table. This can typically be done using a DELETE statement in SQL or through a custom program, but be cautious and ensure you have backups or that this is appropriate for your situation.
  Review Migration Logs: Check the logs of the previous migration attempts to identify any issues that may have caused the process to fail or leave data in the table.
  Run in Test Mode: If you are unsure about the data, consider running the migration in a test mode or in a development environment to ensure that everything works as expected before executing it in production.
  Consult Documentation: Review the SAP documentation related to the specific migration or conversion process you are using, as there may be specific instructions or considerations for handling this error.
  Contact SAP Support: If the issue persists and you cannot resolve it, consider reaching out to SAP support for assistance, especially if this is part of a larger migration project.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SE16 (Data Browser), and others that may help in analyzing the data.
  Migration Cockpit: If you are using the SAP S/4HANA Migration Cockpit, ensure that you are following the recommended steps and guidelines provided by SAP for data migration.
  Backup: Always ensure that you have a backup of your data before making any changes to the database tables.
  
  By following these steps, you should be able to resolve the CNV20200499 error and proceed with your data migration or conversion process.