How To Fix ESH_OM_OBJ_MODEL_REP856 - Relation is used in NAF navigation path &1, step &2

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_OM_OBJ_MODEL_REP - Object Model Repository

• Message number: 856

• Message text: Relation is used in NAF navigation path &1, step &2

What causes this issue?

Relation is used in step &v2& of navigation path &v1& that is used to
assign operational data provider fields to node fields.

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 ESH_OM_OBJ_MODEL_REP856 - Relation is used in NAF navigation path &1, step &2 ?

  The SAP error message ESH_OM_OBJ_MODEL_REP856 indicates that a relation is being used in a navigation path that is not properly defined or is causing issues in the context of the SAP Enterprise Search (SAP ESH) framework. This error typically arises when there are inconsistencies or misconfigurations in the object model or the navigation paths defined in the system.
  Cause:
  
  Inconsistent Object Model: The object model may have been modified, and the relation in question is no longer valid or is incorrectly defined.
  Missing or Incorrect Configuration: The navigation path may reference a relation that is not properly configured or does not exist in the current context.
  Transport Issues: If changes were transported from one system to another, there may be inconsistencies in the object model or navigation paths.
  Data Model Changes: Changes in the underlying data model (like changes in tables or relationships) can lead to this error if the navigation paths are not updated accordingly.
  
  Solution:
  
  Check Object Model Configuration: Review the object model configuration in the SAP ESH settings. Ensure that all relations are correctly defined and that the navigation paths are valid.
  Validate Navigation Paths: Go to the transaction for managing navigation paths (e.g., EshNavPath) and check the specific navigation path and step mentioned in the error message. Ensure that the relations used in the path are valid and exist in the object model.
  Rebuild Indexes: Sometimes, rebuilding the search indexes can resolve inconsistencies. Use the relevant transaction (e.g., EshIndex) to rebuild the indexes.
  Check Transport Requests: If the issue arose after a transport, check the transport logs and ensure that all necessary objects were transported correctly.
  Consult Documentation: Refer to SAP documentation or notes related to the specific version of SAP ESH you are using for any known issues or additional troubleshooting steps.
  Contact SAP Support: If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  Related Information:
  
  SAP ESH Documentation: Review the official SAP documentation for Enterprise Search to understand the configuration and management of object models and navigation paths.
  SAP Notes: Search for relevant SAP Notes that may address this specific error or provide guidance on similar issues.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.