How To Fix IUUC_TAB021 - The following tables are classified both as customer and SAP tables:

SAP Error Message - Details

• Message type: E = Error

• Message class: IUUC_TAB - IUUC: Messages for table analysis

• Message number: 021

• Message text: The following tables are classified both as customer and SAP tables:

What causes this issue?

For the tables listed below, there are entries in both the
classification tables IUUC_TABLES_EVAL (which should exclusively contain
SAP tables) and table IUUC_TABLES_EVALC (which should exclusively
contain customer tables).

System Response

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

How to fix this error?

Please check if these tables are SAP or customer tables, and remove the
entries in the inappropriate table.

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 IUUC_TAB021 - The following tables are classified both as customer and SAP tables: ?

  The SAP error message IUUC_TAB021 indicates that there are tables in your system that are classified as both customer tables and SAP standard tables. This situation can arise during the process of data replication or when using the SAP Landscape Transformation (SLT) tool, particularly when trying to set up or manage data replication scenarios.
  Cause:
  
  
  Table Classification Conflict: The error occurs when a table is defined in such a way that it is recognized as both a customer table (customized by the user) and an SAP standard table (part of the standard SAP delivery). This can happen if a customer has made modifications to a standard table or if there are conflicting definitions in the system.
  
  
  Data Replication Setup: When setting up data replication, SLT checks the classification of tables. If it finds a table that is both a customer and SAP table, it raises this error to prevent potential data inconsistencies.
  
  
  Solution:
  
  
  Review Table Definitions: Check the definitions of the tables mentioned in the error message. You can use transaction codes like SE11 (Data Dictionary) to analyze the table properties and see how they are classified.
  
  
  Adjust Table Classification: If you find that a standard SAP table has been modified and is now classified as a customer table, you may need to revert the changes or adjust the classification. This might involve:
  
  Restoring the original SAP version of the table.
  Removing any custom fields or modifications that have caused the classification conflict.
  
  
  
  Consult SAP Notes: Check for any relevant SAP Notes that might address this specific issue. SAP frequently releases notes that provide guidance on resolving specific errors or conflicts.
  
  
  SLT Configuration: If you are using SLT, ensure that your configuration is correct. You may need to exclude certain tables from replication if they are causing conflicts.
  
  
  Testing: After making changes, test the replication process again to ensure that the error has been resolved.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SE11 (Data Dictionary), SE14 (Database Utility), and SLT configuration transactions to manage and troubleshoot table issues.
  SAP Documentation: Refer to the official SAP documentation for SLT and data replication for best practices and guidelines.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other users who may have encountered similar issues.
  
  If the problem persists after following these steps, consider reaching out to SAP support for further assistance.