How To Fix ADT_DATAPREVIEW_MSG021 - Data preview is not available for custom entities

SAP Error Message - Details

• Message type: E = Error

• Message class: ADT_DATAPREVIEW_MSG - Messsage Class for data preview

• Message number: 021

• Message text: Data preview is not available for custom entities

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message ADT_DATAPREVIEW_MSG021 - Data preview is not available for custom entities ?

  The SAP error message ADT_DATAPREVIEW_MSG021 indicates that data preview functionality is not available for custom entities in the SAP system. This typically occurs in the context of using the ABAP Development Tools (ADT) in Eclipse or similar environments when trying to preview data for custom-defined entities.
  Cause:
  
  Custom Entity Limitation: The data preview feature is often limited to standard entities or those that are fully defined within the system. Custom entities may not have the necessary metadata or configuration to support data preview.
  Missing Configuration: The custom entity may not be properly configured in the system, or it may lack the necessary annotations or definitions that enable data preview functionality.
  Authorization Issues: There may be authorization restrictions preventing access to the data preview for custom entities.
  Technical Constraints: The underlying data model or database structure may not support the preview functionality for custom entities.
  
  Solution:
  
  Check Entity Configuration: Ensure that the custom entity is correctly defined and configured in the system. Verify that all necessary annotations and metadata are in place.
  Use Standard Entities: If possible, use standard entities for which data preview is supported. This can help bypass the limitations associated with custom entities.
  Review Authorizations: Check the user authorizations to ensure that the user has the necessary permissions to access the data preview for the custom entity.
  Consult Documentation: Refer to the SAP documentation or help resources for any specific requirements or limitations regarding data preview for custom entities.
  Debugging: If you have access to the development environment, consider debugging the data preview functionality to identify any underlying issues or exceptions that may be causing the error.
  Contact SAP Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP support for assistance. They may provide insights or patches if this is a known issue.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide updates regarding data preview functionality.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  Version Compatibility: Ensure that your version of the ABAP Development Tools and the SAP system is compatible and up to date, as newer versions may have improved support for custom entities.
  
  By following these steps, you should be able to diagnose and potentially resolve the issue related to the ADT_DATAPREVIEW_MSG021 error message.