How To Fix MSG_UH255 - A subnode canÆt be the reference node of its child subnode.

SAP Error Message - Details

• Message type: E = Error

• Message class: MSG_UH - Universal Hierarchy Message Class

• Message number: 255

• Message text: A subnode canÆt be the reference node of its child subnode.

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message MSG_UH255 - A subnode canÆt be the reference node of its child subnode. ?

  The SAP error message MSG_UH255 indicates that there is a problem with the hierarchical structure of nodes in a certain context, typically related to the configuration of a master data object, such as a material or a business partner. The error message states that a subnode cannot be the reference node for its child subnode, which means that there is a circular or invalid reference in the hierarchy.
  Cause:
  
  Hierarchical Structure Violation: The error usually occurs when you try to set a node as a reference for its own child. This creates a logical inconsistency in the hierarchy.
  Incorrect Configuration: The configuration of the nodes may not adhere to the rules defined in the system, leading to this error.
  Data Integrity Issues: There may be issues with the data integrity in the master data, where the relationships between nodes are not correctly defined.
  
  Solution:
  
  Review Hierarchical Structure: Check the hierarchical structure of the nodes involved. Ensure that no node is set as a reference for its own child. You may need to adjust the relationships between nodes.
  Correct Node References: If you find that a node is incorrectly set as a reference for its child, change the reference to a valid parent node that does not create a circular reference.
  Data Validation: Validate the data in the system to ensure that all nodes and their relationships are correctly defined and do not violate any hierarchical rules.
  Use Transaction Codes: Depending on the context, you may need to use specific transaction codes (like BP for Business Partners or MM01 for Material Master) to correct the data.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on managing hierarchical data structures in your particular module.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Transaction Codes: Familiarize yourself with relevant transaction codes that may help in managing hierarchical data, such as SE11 (Data Dictionary) or SE80 (Object Navigator).
  Support: If the issue persists, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  By following these steps, you should be able to resolve the MSG_UH255 error and ensure that your hierarchical data structure is correctly configured.