How To Fix RSD_TREX523 - No indexes exist with status "Unknown"

SAP Error Message - Details

• Message type: E = Error

• Message class: RSD_TREX - Messages from TREX Aggregate Area

• Message number: 523

• Message text: No indexes exist with status "Unknown"

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 RSD_TREX523 - No indexes exist with status "Unknown" ?

  The SAP error message RSD_TREX523, which states "No indexes exist with status 'Unknown'," typically occurs in the context of SAP BW (Business Warehouse) when there are issues related to the indexing of InfoProviders, particularly when using the TREX (Text Retrieval and Extraction) engine for search functionalities.
  Cause:
  
  Indexing Issues: The primary cause of this error is that the TREX index for the InfoProvider has not been created or is in an inconsistent state. This can happen if the indexing process was interrupted or if there were changes made to the InfoProvider that require re-indexing.
  Configuration Problems: There may be configuration issues with the TREX server or the connection between SAP BW and TREX.
  Data Model Changes: If there have been recent changes to the data model (like adding or removing fields), the existing indexes may no longer be valid.
  System Errors: There could be underlying system errors or issues with the TREX server itself.
  
  Solution:
  
  
  Rebuild Indexes: The most common solution is to rebuild the indexes for the affected InfoProvider. This can be done through the SAP BW administration interface:
  
  Go to the InfoProvider in the SAP BW system.
  Navigate to the "Manage" or "Administration" section.
  Look for options related to indexing and select "Rebuild Index" or "Create Index."
  
  
  
  Check TREX Status: Ensure that the TREX server is running and properly configured. You can check the TREX administration interface for any errors or warnings.
  
  
  Monitor Background Jobs: Check if there are any background jobs related to indexing that have failed. You can do this in transaction SM37.
  
  
  Check for Data Model Changes: If there have been changes to the data model, ensure that all necessary adjustments have been made and that the InfoProvider is activated.
  
  
  Consult Logs: Review the logs for any additional error messages that might provide more context about the issue. You can check the transaction SLG1 for application logs related to TREX.
  
  
  SAP Notes: Look for relevant SAP Notes that might address this specific error or provide patches or updates that could resolve the issue.
  
  
  Related Information:
  
  TREX Administration: Familiarize yourself with the TREX administration tools and how to monitor and manage indexes.
  SAP BW Documentation: Review the SAP BW documentation for best practices on managing InfoProviders and indexing.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  Support: If the issue persists, consider reaching out to SAP Support for assistance, especially if it involves deeper system issues or bugs.
  
  By following these steps, you should be able to resolve the RSD_TREX523 error and restore the functionality of your SAP BW system.