How To Fix ESH_OM_OBJ_MODEL_REP645 - Field name &1 not possible due to indexing restrictions

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_OM_OBJ_MODEL_REP - Object Model Repository

• Message number: 645

• Message text: Field name &1 not possible due to indexing restrictions

What causes this issue?

During creation of search engine indices<(>,<)> special characters in
field names have to be converted. Field name &v1& has to be converted to
&v2&, but there is already a field with this name.

System Response

The field name is invalid.

How to fix this error?

Choose another field name.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

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_REP645 - Field name &1 not possible due to indexing restrictions ?

  The SAP error message ESH_OM_OBJ_MODEL_REP645 indicates that there is an issue related to indexing restrictions for a specific field in the SAP Enterprise Search (SAP ESH) environment. This error typically arises when a field that you are trying to use in a search or query operation is not indexed or is restricted from being indexed due to certain limitations or configurations.
  Cause:
  
  Field Not Indexed: The field you are trying to access may not be indexed in the search model. This can happen if the field is not included in the data model or if it has been explicitly excluded from indexing.
  Indexing Restrictions: Certain fields may have restrictions based on their data type, length, or other characteristics that prevent them from being indexed.
  Configuration Issues: There may be configuration issues in the search model or the underlying data source that prevent the field from being indexed properly.
  
  Solution:
  
  
  Check Field Configuration:
  
  Verify if the field in question is included in the search model configuration. You can do this by checking the relevant data model in the SAP ESH configuration.
  Ensure that the field is marked for indexing and is not excluded.
  
  
  
  Review Indexing Settings:
  
  Check the indexing settings for the search model. Make sure that the field meets the criteria for indexing (e.g., data type, length).
  If necessary, adjust the settings to allow the field to be indexed.
  
  
  
  Rebuild Index:
  
  If changes have been made to the configuration, you may need to rebuild the index for the search model. This can be done through the SAP ESH administration tools.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for Enterprise Search to understand the limitations and requirements for indexing fields. This can provide insights into why a specific field may not be indexed.
  
  
  
  Check for Updates:
  
  Ensure that your SAP system is up to date with the latest patches and updates, as there may be bug fixes or enhancements related to indexing in newer versions.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance. They can provide more detailed insights based on your specific system configuration.
  
  
  
  Related Information:
  
  SAP Enterprise Search: A tool that allows users to search across various SAP applications and data sources.
  Data Model Configuration: The process of defining which fields and data sources are included in the search model.
  Indexing in SAP: The process of creating an index for fields to improve search performance and enable search capabilities.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.