How To Fix UMG302 - Some tables exist in the Default Exception List already.

SAP Error Message - Details

• Message type: E = Error

• Message class: UMG - Message Class for the Unicode Migration Tool.

• Message number: 302

• Message text: Some tables exist in the Default Exception List already.

What causes this issue?

You tried to insert tables into the Customer Exception List. But some of
the tables exist already in the Default Exception List delivered by
SAP.

System Response

Only tables which are not in the Default Exception List have been
inserted into the Customer Exception List.

How to fix this error?

If you want to change the settings for a table in the Default Exception
List, you have to delete it first from the Default Exception List. After
wards you can insert the table into the Customer Exception List.

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 UMG302 - Some tables exist in the Default Exception List already. ?

  The SAP error message UMG302, which states "Some tables exist in the Default Exception List already," typically occurs in the context of data migration or data management processes, particularly when using tools like SAP Data Services or SAP Landscape Transformation (SLT). This error indicates that the system has detected that certain tables you are trying to add to an exception list are already included in the default exception list.
  Cause:
  
  Duplicate Entries: The tables you are trying to add are already present in the default exception list, which is used to exclude certain tables from being processed during data migration or replication.
  Configuration Issues: There may be a misconfiguration in the data migration settings or the exception list itself.
  User Error: The user may have attempted to add tables that are not meant to be included in the current operation.
  
  Solution:
  
  Check the Default Exception List: Review the default exception list to confirm which tables are already included. You can do this by navigating to the relevant configuration settings in your SAP system.
  Remove Duplicates: If you find that the tables you are trying to add are indeed in the exception list, you can either remove them from the list if they should be processed or skip adding them again.
  Modify the Exception List: If necessary, modify the exception list to ensure it reflects the current requirements of your data migration or replication process.
  Consult Documentation: Refer to the SAP documentation for the specific tool you are using (e.g., SAP Data Services, SLT) for guidance on managing exception lists and understanding the implications of modifying them.
  Contact Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance, especially if this is impacting critical business processes.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  Transaction Codes: Familiarize yourself with transaction codes related to data migration and exception handling, such as SLT for Landscape Transformation or DS for Data Services.
  Best Practices: Follow best practices for data migration, including thorough testing in a development environment before applying changes in production.
  
  By following these steps, you should be able to resolve the UMG302 error and proceed with your data migration or replication tasks.