How To Fix KU402 - No more work processes available

SAP Error Message - Details

• Message type: E = Error

• Message class: KU - Costing: Rollup

• Message number: 402

• Message text: No more work processes 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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message KU402 - No more work processes available ?

  The SAP error message KU402 "No more work processes available" indicates that the SAP system has run out of available work processes to handle incoming requests. This can occur for several reasons, and understanding the cause is essential for finding a solution.
  Causes:
  
  Exhausted Work Process Limits: The number of work processes configured in the SAP system may be insufficient for the current workload.
  Long-Running Transactions: Some transactions may be taking too long to complete, holding onto work processes and preventing new requests from being processed.
  High Volume of Concurrent Users: An unexpected surge in user activity can lead to more requests than the system can handle.
  Configuration Issues: Incorrect configuration of the instance profile settings related to work processes can lead to this error.
  Resource Bottlenecks: System resource limitations (CPU, memory, etc.) can slow down processing and lead to work processes being tied up.
  
  Solutions:
  
  
  Increase Work Process Configuration:
  
  Review and adjust the number of work processes in the instance profile. You can do this by accessing the SAP profile parameters (e.g., rdisp/wp_no_dia, rdisp/wp_no_btc, etc.) and increasing the limits based on your system's capacity and workload.
  After making changes, restart the SAP instance for the new settings to take effect.
  
  
  
  Monitor and Optimize Long-Running Transactions:
  
  Use transaction codes like ST22 (dump analysis) and SM66 (global work process overview) to identify long-running processes.
  Analyze and optimize the code or processes that are taking too long to complete.
  
  
  
  Check System Resources:
  
  Monitor system performance using tools like ST03N (workload analysis) to identify any resource bottlenecks.
  Ensure that the server has adequate CPU and memory resources to handle the workload.
  
  
  
  Limit Concurrent Users:
  
  If possible, limit the number of concurrent users or schedule heavy processing jobs during off-peak hours to reduce the load on the system.
  
  
  
  Review Background Jobs:
  
  Check for any background jobs that may be consuming excessive resources or running longer than expected. You can use transaction SM37 to monitor background jobs.
  
  
  
  Restart the SAP System:
  
  As a temporary measure, restarting the SAP system can free up work processes that may be stuck or not releasing properly.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM50: Monitor work processes.
  SM66: Global work process overview.
  ST03N: Workload analysis.
  ST22: Dump analysis.
  SM37: Job monitoring.
  
  
  
  SAP Notes: Check SAP Notes related to work process management for specific guidance and troubleshooting steps.
  
  
  Documentation: Refer to the SAP Basis documentation for detailed information on configuring and managing work processes.
  
  
  By addressing the underlying causes and implementing the suggested solutions, you should be able to resolve the KU402 error and improve the overall performance of your SAP system.