How To Fix RSOS021 - Search not performed; RFC connection to TREX engine is null

SAP Error Message - Details

• Message type: E = Error

• Message class: RSOS - Message class for BI Metadata Search with TREX

• Message number: 021

• Message text: Search not performed; RFC connection to TREX engine is null

What causes this issue?

RFC connection to TREX engine is Null.

System Response

Search is not possible.

How to fix this error?

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

Procedure for System Administrators

To enter the RFC connection:
Execute transaction <LB>RSODADMIN</>.
In the <LS>Administration of BW Metadata Search</> screen, in <LS>RFC
Destination</>, select the appropriate RFC destination.
Choose <LS>Execute.</>

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSOS021 - Search not performed; RFC connection to TREX engine is null ?

  The SAP error message RSOS021: Search not performed; RFC connection to TREX engine is null typically indicates that there is an issue with the connection between the SAP system and the TREX (Text Retrieval and Extraction) engine, which is used for full-text search capabilities in SAP.
  Cause:
  
  RFC Connection Issues: The RFC (Remote Function Call) connection to the TREX engine may not be configured correctly or may be down.
  TREX Engine Not Running: The TREX engine itself may not be running or may have encountered an error.
  Network Issues: There could be network connectivity issues preventing the SAP system from reaching the TREX engine.
  Authorization Issues: The user or system may not have the necessary authorizations to access the TREX engine.
  Configuration Errors: Incorrect configuration settings in the SAP system or TREX settings can lead to this error.
  
  Solution:
  
  
  Check RFC Connection:
  
  Go to transaction SM59 in the SAP GUI.
  Check the RFC connection to the TREX engine. Ensure that it is configured correctly and test the connection to see if it is successful.
  
  
  
  Verify TREX Status:
  
  Ensure that the TREX engine is running. You can check the TREX administration tools or logs to confirm its status.
  If TREX is not running, start the TREX service.
  
  
  
  Network Connectivity:
  
  Check for any network issues that might be preventing the SAP system from connecting to the TREX engine.
  Ensure that firewalls or network policies are not blocking the connection.
  
  
  
  Review Authorizations:
  
  Ensure that the user or system has the necessary authorizations to access the TREX engine.
  Check the roles and authorizations assigned to the user in the SAP system.
  
  
  
  Configuration Review:
  
  Review the configuration settings in both the SAP system and the TREX engine to ensure they are correct.
  Check for any recent changes that might have affected the connection.
  
  
  
  Logs and Traces:
  
  Check the logs in both the SAP system and the TREX engine for any error messages or warnings that could provide more context about the issue.
  
  
  
  Restart Services:
  
  If all else fails, consider restarting the TREX engine and/or the SAP application server to clear any transient issues.
  
  
  
  Related Information:
  
  TREX Documentation: Refer to the official SAP documentation for TREX for detailed configuration and troubleshooting steps.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address known issues related to TREX and RFC connections.
  System Logs: Use transaction SM21 to check the system logs for any related error messages that could provide additional insights.
  
  By following these steps, you should be able to diagnose and resolve the RSOS021 error in your SAP system.