How To Fix RS_DME_ABC021 - Class &1 occurs several times. It should only occur once

SAP Error Message - Details

• Message type: E = Error

• Message class: RS_DME_ABC - Messages for ABC Classification

• Message number: 021

• Message text: Class &1 occurs several times. It should only occur once

What causes this issue?

A class can only be used in one classification rule in ABC
classification.
However, you have used the same class in several classification rules.

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?

Use a class that you have not yet used.

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 RS_DME_ABC021 - Class &1 occurs several times. It should only occur once ?

  The SAP error message RS_DME_ABC021 indicates that a specific class (denoted by &1) is being processed multiple times when it should only occur once. This error typically arises in the context of data extraction or data transfer processes, particularly in the Data Warehousing or Business Intelligence modules.
  Cause:
  
  
  Duplicate Entries: The most common cause of this error is the presence of duplicate entries in the data source or in the data model that is being processed. This can happen if the data is not properly cleaned or if there are issues with the data extraction logic.
  
  
  Incorrect Configuration: Misconfiguration in the data model or extraction settings can lead to the same class being processed multiple times.
  
  
  Data Source Issues: If the data source itself has issues, such as incorrect joins or relationships, it can lead to multiple occurrences of the same class.
  
  
  Transformation Logic: If there are transformations applied that inadvertently cause duplication, this can also trigger the error.
  
  
  Solution:
  
  
  Check for Duplicates: Review the data source for duplicate entries. You can use SQL queries or data profiling tools to identify and eliminate duplicates.
  
  
  Review Configuration: Check the configuration settings for the data extraction or transformation process. Ensure that the settings are correct and that there are no misconfigurations that could lead to multiple processing of the same class.
  
  
  Adjust Transformation Logic: If transformations are causing duplication, review and adjust the logic to ensure that each class is processed only once.
  
  
  Data Model Review: Examine the data model for any incorrect relationships or joins that might be causing the duplication. Ensure that the model accurately reflects the intended data structure.
  
  
  Debugging: If the issue persists, consider enabling debugging or logging to trace the execution flow and identify where the duplication is occurring.
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes or patches that may address this specific error. Sometimes, there are known issues with specific versions of SAP that have been documented and resolved.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for the specific module you are working with (e.g., BW, BI) for more detailed troubleshooting steps.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  SAP Support: If the issue cannot be resolved internally, consider reaching out to SAP Support for assistance, providing them with detailed information about the error and the context in which it occurs.
  
  By following these steps, you should be able to identify the root cause of the RS_DME_ABC021 error and implement a solution to resolve it.