How To Fix RSD_TREX121 - BWA index has type '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: RSD_TREX - Messages from TREX Aggregate Area

• Message number: 121

• Message text: BWA index has type '&1'

What causes this issue?

BWA indexes can have the following types:
Normal (ICB): The full star schema of the InfoCube is reproduced on the
BWA server.
Flat (ICF): The inner part of the star schema (fact and dimension
tables) is denormalized.
The standard type is "normal". Type "flat" is only used if two dimension
tables are very large. Memory consumption is higher for this type, but
it is preferable in cases like this because it reduces the amount of
internal communication required for queries on the BWA server.

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 RSD_TREX121 - BWA index has type '&1' ?

  The SAP error message RSD_TREX121 indicates an issue with the BWA (Business Warehouse Accelerator) index type. The message typically states that the BWA index has an unexpected or incorrect type, which can prevent the system from executing queries or accessing data as intended.
  Cause:
  The error can occur due to several reasons, including:
  
  Incorrect Index Type: The BWA index may not be of the expected type for the query or data model being used.
  Index Corruption: The index may be corrupted or not properly built, leading to inconsistencies.
  Version Mismatch: There may be a mismatch between the BWA version and the SAP BW version, causing compatibility issues.
  Configuration Issues: Incorrect configuration settings in the BWA or BW system can lead to this error.
  
  Solution:
  To resolve the RSD_TREX121 error, you can follow these steps:
  
  
  Check Index Type: Verify the type of the BWA index in the SAP BW system. Ensure that it matches the expected type for the queries you are running.
  
  
  Rebuild the Index: If the index is corrupted or not functioning correctly, you may need to rebuild it. This can be done through the SAP BW administration tools:
  
  Go to the BWA administration transaction (e.g., RSA1).
  Navigate to the InfoProvider and check the index status.
  Rebuild the index if necessary.
  
  
  
  Check Compatibility: Ensure that the versions of SAP BW and BWA are compatible. If there is a version mismatch, consider upgrading or patching the systems.
  
  
  Review Configuration: Check the configuration settings for the BWA and ensure they are set up correctly. This includes checking the connection settings and any relevant parameters.
  
  
  Consult SAP Notes: Look for relevant SAP Notes that may address this specific error. SAP frequently updates its knowledge base with solutions for known issues.
  
  
  Contact SAP Support: If the issue persists after trying the above steps, consider reaching out to SAP Support for further assistance. Provide them with detailed information about the error and the steps you have already taken.
  
  
  Related Information:
  
  SAP BW Documentation: Review the official SAP BW documentation for more details on BWA configuration and management.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Performance Monitoring: Regularly monitor the performance of your BWA indexes to prevent issues from arising in the future.
  
  By following these steps, you should be able to diagnose and resolve the RSD_TREX121 error effectively.