How To Fix CLASSIFICATION_TOOL221 - Cirular link chain detected (at &1 &2 &3 &4).

CLASSIFICATION_TOOL221 - Overview

• Message type: E = Error

• Message class: CLASSIFICATION_TOOL - Classification tool

• Message number: 221

• Message text: Cirular link chain detected (at &1 &2 &3 &4).

What causes this issue?

The classification of an object A has been linked to the classification
of another object B. Object B is again directly or indirectly linked to
A. The links make up a cycle.

System Response

The classification system ignores such cycles and does not allow to
create them.

How to fix this error?

Edit the classification of one of the objects involved in the cycle and
break it.

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.

CLASSIFICATION_TOOL221 - Details

• The SAP error message CLASSIFICATION_TOOL221 indicates that a circular link chain has been detected in the classification system. This typically occurs when there is a recursive relationship in the classification hierarchy, which can lead to infinite loops or inconsistencies in data processing.
  
  Cause:
  The circular link chain can be caused by:
  
  Incorrect Hierarchical Structure: If a class or characteristic is incorrectly linked to itself or to another class that eventually links back to it, it creates a circular reference.
  Data Entry Errors: Manual errors during the creation or modification of classes or characteristics can lead to unintended circular links.
  System 
  Configuration Issues: Misconfigurations in the classification settings or during the import of classification data can also lead to circular references.
  
  
  Solution:
  To resolve the CLASSIFICATION_TOOL221 error, you can follow these steps:
  
  
  Identify the Circular Link:
  
  Review the error message details, which typically include the objects involved in the circular link (indicated by &1, &2, &3, &4).
  Use transaction codes like