How To Fix RSD_TREX666 - No TREX RFC connections available

SAP Error Message - Details

• Message type: E = Error

• Message class: RSD_TREX - Messages from TREX Aggregate Area

• Message number: 666

• Message text: No TREX RFC connections available

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSD_TREX666 - No TREX RFC connections available ?

  The SAP error message RSD_TREX666 indicates that there are no available TREX (Text Retrieval and Extraction) RFC (Remote Function Call) connections. This error typically occurs when the SAP system is unable to connect to the TREX server, which is responsible for handling text search and retrieval functionalities in SAP BW (Business Warehouse) and other SAP applications.
  Causes:
  
  TREX Server Down: The TREX server may not be running or may have crashed.
  Network Issues: There could be network connectivity issues between the SAP application server and the TREX server.
  Configuration Issues: The RFC destination for the TREX server may not be configured correctly in the SAP system.
  Resource Limitations: The TREX server may be overloaded or have reached its maximum number of connections.
  Authorization Issues: The user may not have the necessary authorizations to access the TREX server.
  
  Solutions:
  
  
  Check TREX Server Status:
  
  Ensure that the TREX server is up and running. You can check the status using the TREX administration tools or by accessing the TREX server directly.
  
  
  
  Verify Network Connectivity:
  
  Test the network connection between the SAP application server and the TREX server. You can use tools like ping or telnet to check connectivity.
  
  
  
  Review RFC Configuration:
  
  Go to transaction SM59 in the SAP GUI and check the RFC destination for the TREX server. Ensure that it is configured correctly and that the connection test is successful.
  
  
  
  Monitor TREX Resources:
  
  Check the TREX server for any performance issues or resource limitations. You may need to increase the resources allocated to the TREX server or optimize its configuration.
  
  
  
  Check Authorizations:
  
  Ensure that the user has the necessary authorizations to access the TREX server. You may need to review the user roles and permissions.
  
  
  
  Restart Services:
  
  If the TREX server is running but still not responding, consider restarting the TREX services or the entire TREX server.
  
  
  
  Consult Logs:
  
  Review the logs on both the SAP system and the TREX server for any error messages or warnings that could provide more insight into the issue.
  
  
  
  Related Information:
  
  TREX Administration: Familiarize yourself with the TREX administration tools and documentation to manage and troubleshoot TREX-related issues effectively.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address specific issues related to TREX and the RSD_TREX666 error.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  
  By following these steps, you should be able to diagnose and resolve the RSD_TREX666 error effectively.