How To Fix CNV_DMC_WDA059 - Cannot change the active view; data exists in the staging tables

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_WDA - Messages used in WDA UI

• Message number: 059

• Message text: Cannot change the active view; data exists in the staging tables

What causes this issue?

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

System Response

How to fix this error?

You can change the default view only when all the staging tables in the
project are empty.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_WDA059 - Cannot change the active view; data exists in the staging tables ?

  The SAP error message CNV_DMC_WDA059 indicates that there is an issue with changing the active view in the Data Migration Cockpit (DMC) because there is existing data in the staging tables. This typically occurs during data migration processes when you attempt to switch views or configurations while there are still records present in the staging area.
  Cause:
  
  Existing Data in Staging Tables: The primary cause of this error is that there are records in the staging tables that have not been processed or cleared. The system prevents changes to the active view to avoid inconsistencies or data loss.
  Incomplete Migration Process: If the migration process was interrupted or not completed, it may leave data in the staging tables.
  Configuration Issues: There may be configuration settings that are preventing the change of views.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Staging Tables: 
  
  Access the relevant staging tables in the DMC and check for any existing records. You can use transaction codes like SE16 or SE16N to view the data in the tables.
  
  
  
  Clear Staging Tables:
  
  If you determine that the data in the staging tables is no longer needed, you can clear the tables. This can typically be done through the DMC interface or by executing specific delete commands in the database (ensure you have backups and proper authorizations before doing this).
  
  
  
  Complete Migration Steps:
  
  If the migration process was incomplete, ensure that all necessary steps are completed before attempting to change the active view again.
  
  
  
  Review Configuration:
  
  Check the configuration settings in the DMC to ensure that they are set up correctly. This includes reviewing the migration project settings and ensuring that they align with your current migration needs.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation or notes related to the Data Migration Cockpit for any specific instructions or troubleshooting steps related to this error.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance. They may provide additional insights or patches if this is a known issue.
  
  
  
  Related Information:
  
  Data Migration Cockpit (DMC): A tool used in SAP for migrating data from legacy systems to SAP S/4HANA or other SAP systems.
  Staging Tables: Temporary tables used during the data migration process to hold data before it is transferred to the final target tables.
  Error Handling: Familiarize yourself with error handling in the DMC to better manage and troubleshoot issues during data migration.
  
  By following these steps, you should be able to resolve the CNV_DMC_WDA059 error and successfully change the active view in the Data Migration Cockpit.