How To Fix TREX_EXT_PE001 - Request &1: No free cells available. Assert query has failed.

SAP Error Message - Details

• Message type: E = Error

• Message class: TREX_EXT_PE - TREX Planning Engine

• Message number: 001

• Message text: Request &1: No free cells available. Assert query has failed.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message TREX_EXT_PE001 - Request &1: No free cells available. Assert query has failed. ?

  The SAP error message TREX_EXT_PE001 indicates that there are no free cells available for processing a request in the TREX (Text Retrieval and Extraction) engine. This typically occurs when the system runs out of resources to handle additional requests, which can happen due to various reasons such as high load, configuration issues, or resource limitations.
  Causes:
  
  Resource Exhaustion: The TREX server may have reached its limit in terms of available memory or processing capacity.
  Configuration Issues: Incorrect configuration settings for the TREX server can lead to inefficient resource allocation.
  High Load: A sudden spike in requests or a large number of concurrent users can overwhelm the TREX server.
  Long-running Queries: Queries that take too long to execute can hold onto resources longer than necessary, leading to exhaustion of available cells.
  System Limits: The system may have been configured with a low limit for the number of cells available for processing.
  
  Solutions:
  
  
  Monitor and Optimize Resource Usage:
  
  Check the TREX server's resource usage (CPU, memory) and optimize queries to reduce load.
  Use transaction codes like ST02 (Buffer Monitor) and ST03N (Workload Analysis) to analyze performance.
  
  
  
  Increase Available Resources:
  
  If possible, increase the hardware resources allocated to the TREX server (e.g., more memory or CPU).
  Adjust the configuration settings to allow for more cells if the system permits.
  
  
  
  Review and Optimize Queries:
  
  Analyze the queries being executed to identify any that can be optimized for better performance.
  Consider breaking down complex queries into simpler ones if applicable.
  
  
  
  Restart TREX Server:
  
  Sometimes, a simple restart of the TREX server can free up resources and resolve temporary issues.
  
  
  
  Check Configuration Settings:
  
  Review the TREX configuration settings to ensure they are set appropriately for your workload.
  Consult SAP documentation or support for recommended settings based on your environment.
  
  
  
  Load Balancing:
  
  If you have multiple TREX servers, consider implementing load balancing to distribute requests more evenly across servers.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to TREX and performance issues for specific patches or updates that may address known issues.
  TREX Administration: Familiarize yourself with TREX administration tools and logs to monitor performance and troubleshoot issues.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.