How To Fix ACO304 - User group &1 cannot be assigned: Cycle in hierarchy

ACO304 - Overview

• Message type: E = Error

• Message class: ACO - Error Messages for Package ACO

• Message number: 304

• Message text: User group &1 cannot be assigned: Cycle in hierarchy

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message ACO304 - User group &1 cannot be assigned: Cycle in hierarchy ?

  The SAP error message ACO304 indicates that there is a cycle in the user group hierarchy when trying to assign a user group to another user group. This typically occurs in the context of user group management, where user groups can be nested or assigned to one another.
  
  Cause:
  The error arises when there is an attempt to create a circular reference in the user group hierarchy. For example, if User Group A is assigned to User Group B, and User Group B is also assigned back to User Group A, this creates a cycle, which is not allowed in SAP.
  
  Solution:
  To resolve this error, you need to check the user group assignments and ensure that there are no circular references. Here are the steps you can take:
  
  
  Review User Group Assignments:
  
  Go to the transaction code for user group management (e.g., SU01 for user maintenance or SU10 for mass user maintenance).
  Check the assignments of