How To Fix TG458 - **** Check for loss of customer fields ended without warnings

SAP Error Message - Details

• Message type: E = Error

• Message class: TG - Messages for Upgrade Repository Switch

• Message number: 458

• Message text: **** Check for loss of customer fields ended without warnings

What causes this issue?

There was a check whether customer fields could be accidentally lost
due to the conversions caused by the update.

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?

Continue with the update.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TG458 - **** Check for loss of customer fields ended without warnings ?

  The SAP error message TG458, which states "Check for loss of customer fields ended without warnings," typically indicates that there is a potential issue related to the loss of custom fields during a system upgrade or data migration process. This message is often associated with the use of the Data Dictionary (DDIC) in SAP, where custom fields may not be properly handled or recognized during changes to the database structure.
  Cause:
  
  Custom Fields: The error usually arises when there are custom fields in the database that may not be compatible with the new version of the software or the changes being made.
  Data Dictionary Changes: Changes in the Data Dictionary (like adding, modifying, or deleting fields) can lead to inconsistencies if custom fields are not properly accounted for.
  Upgrade or Migration: This message often appears during system upgrades or migrations when the system checks for potential data loss or inconsistencies.
  
  Solution:
  
  Check Custom Fields: Review the custom fields in the affected tables. Ensure that they are still valid and compatible with the new version of the software.
  Adjust Data Dictionary: If necessary, adjust the Data Dictionary to ensure that custom fields are properly defined and recognized.
  Use Transaction SE11: Use transaction SE11 (Data Dictionary) to check the definitions of the tables and fields involved. Look for any discrepancies or issues with the custom fields.
  Consult SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on handling custom fields during upgrades.
  Testing: After making adjustments, perform thorough testing to ensure that the custom fields are functioning as expected and that there are no data loss issues.
  Backup: Always ensure that you have a backup of your data before making any changes to the Data Dictionary or performing upgrades.
  
  Related Information:
  
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. They can provide specific guidance based on your system configuration and the nature of the custom fields.
  Documentation: Review SAP documentation related to Data Dictionary changes and custom fields to understand best practices and potential pitfalls.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to address the TG458 error and ensure that your custom fields are properly managed during system changes.