How To Fix RTCMMD093 - A top node already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: RTCMMD - Article Hierarchy

• Message number: 093

• Message text: A top node already exists

What causes this issue?

Each material hierarchy can only have one top node. The top node is the
root node of the material hierarchy.

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?

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 RTCMMD093 - A top node already exists ?

  The SAP error message RTCMMD093 "A top node already exists" typically occurs in the context of SAP Master Data Management (MDM) or when working with hierarchical data structures, such as when trying to create or modify a hierarchy in a data model.
  Cause:
  This error indicates that you are attempting to create a new top node in a hierarchy where a top node already exists. In hierarchical data structures, a top node (or root node) is the highest level in the hierarchy, and there can only be one top node at any given time. If you try to create another top node without first removing or modifying the existing one, you will encounter this error.
  Solution:
  To resolve the RTCMMD093 error, you can follow these steps:
  
  
  Check Existing Hierarchy: Review the existing hierarchy to identify the current top node. You can do this by navigating to the relevant data model or hierarchy structure in SAP.
  
  
  Modify or Delete Existing Top Node: 
  
  If you need to create a new top node, you will first need to either modify the existing top node or delete it if it is no longer needed.
  If you choose to delete the existing top node, ensure that this action does not violate any business rules or data integrity constraints.
  
  
  
  Create New Top Node: After ensuring that there is no existing top node, you can proceed to create your new top node.
  
  
  Check for Data Integrity: Ensure that any changes you make do not affect the integrity of the data model or hierarchy. It may be necessary to validate the hierarchy after making changes.
  
  
  Consult Documentation: If you are unsure about the steps or implications of modifying the hierarchy, consult the SAP documentation or reach out to your SAP support team for guidance.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message. Sometimes, there may be known issues or fixes provided by SAP.
  Transaction Codes: Familiarize yourself with relevant transaction codes that deal with hierarchy management in SAP, such as MDM or SE11 for data model management.
  User Permissions: Ensure that you have the necessary permissions to modify the hierarchy. Lack of permissions can sometimes lead to unexpected errors.
  
  If the problem persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.