How To Fix XC186 - No free work process available for parallelized data selection

SAP Error Message - Details

• Message type: E = Error

• Message class: XC - Message Class for Core Interface

• Message number: 186

• Message text: No free work process available for parallelized data selection

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 XC186 - No free work process available for parallelized data selection ?

  The SAP error message XC186: No free work process available for parallelized data selection typically occurs when the system is unable to allocate a work process to handle a request for parallel processing. This can happen in various scenarios, such as during data selection operations that are designed to run in parallel to improve performance.
  Causes:
  
  Insufficient Work Processes: The SAP system may not have enough work processes configured to handle the number of parallel requests being made.
  High Load on the System: If the system is under heavy load, all available work processes may be busy, leading to this error.
  Configuration Issues: The configuration settings for the number of work processes may not be optimized for the workload.
  Long-Running Transactions: If there are long-running transactions or jobs, they may occupy work processes for extended periods, preventing new requests from being processed.
  System Resource Limitations: Limited CPU or memory resources can also lead to a situation where work processes cannot be allocated.
  
  Solutions:
  
  
  Increase the Number of Work Processes:
  
  Go to transaction RZ10 or RZ11 to adjust the profile parameters related to work processes. You can increase the number of dialog, background, or update work processes as needed.
  After making changes, restart the SAP instance for the changes to take effect.
  
  
  
  Monitor and Optimize Workload:
  
  Use transaction SM50 or SM66 to monitor the current work processes and see if any are stuck or taking too long.
  Identify and optimize long-running transactions or jobs that may be holding up work processes.
  
  
  
  Check System Performance:
  
  Use transaction ST03N to analyze the workload and performance of the system. Look for any bottlenecks or resource constraints.
  Consider optimizing database queries or adjusting the application logic to reduce the load.
  
  
  
  Adjust Parallel Processing Settings:
  
  Review the settings for parallel processing in the specific transaction or report that is generating the error. Some transactions allow you to configure the degree of parallelism.
  
  
  
  Review System Logs:
  
  Check the system logs (transaction SM21) for any additional errors or warnings that may provide more context about the issue.
  
  
  
  Consult SAP Notes:
  
  Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to this error message.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM50: Monitor work processes.
  SM66: Monitor work processes across the system.
  RZ10: Profile parameter maintenance.
  ST03N: Workload analysis.
  SM21: System log.
  
  
  
  SAP Documentation: Refer to the official SAP documentation for detailed information on work process management and performance tuning.
  
  
  By addressing the underlying causes and implementing the suggested solutions, you should be able to resolve the XC186 error and improve the performance of your SAP system.