How To Fix ESH_OM_OBJ_MODEL_REP891 - Hierarchy of attribute groups contains a loop

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_OM_OBJ_MODEL_REP - Object Model Repository

• Message number: 891

• Message text: Hierarchy of attribute groups contains a loop

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 ESH_OM_OBJ_MODEL_REP891 - Hierarchy of attribute groups contains a loop ?

  The SAP error message ESH_OM_OBJ_MODEL_REP891 indicates that there is a loop in the hierarchy of attribute groups within the Enterprise Search (ES) Object Model. This typically occurs when the configuration of attribute groups is set up in such a way that it creates a circular reference, which can lead to issues in data retrieval and processing.
  Cause:
  
  Circular Reference: The most common cause of this error is a circular reference in the hierarchy of attribute groups. For example, if Attribute Group A references Attribute Group B, and Attribute Group B references Attribute Group A, this creates a loop.
  Incorrect Configuration: Misconfiguration of attribute groups or their relationships can lead to this issue. This might happen during the setup or modification of the attribute groups in the SAP system.
  Data Model Changes: Changes made to the data model or attribute groups without proper validation can also introduce loops.
  
  Solution:
  
  Review Attribute Group Configuration: Check the configuration of the attribute groups in the SAP system. Look for any circular references and correct them. Ensure that each attribute group is only referencing other groups in a linear fashion without creating loops.
  Use Transaction Codes: Utilize transaction codes like ES_HIERARCHY or ES_ATTR_GROUP to analyze and modify the attribute groups and their relationships.
  Testing: After making changes, test the configuration to ensure that the error does not reoccur. You can do this by running the relevant search queries or processes that were previously failing.
  Documentation: Document the changes made to the attribute groups for future reference and to avoid similar issues.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide guidance on best practices for configuring attribute groups.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have implemented.
  System Logs: Review system logs for additional context or related errors that might provide further insight into the problem.
  
  If the issue persists after following these steps, consider reaching out to SAP support for more specialized assistance.