How To Fix 14400 - No free dialog work process available

SAP Error Message - Details

• Message type: E = Error

• Message class: 14 - Task handler messages

• Message number: 400

• Message text: No free dialog work process 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 14400 - No free dialog work process available ?

  The SAP error message "14400 No free dialog work process available" indicates that all dialog work processes in the SAP system are currently busy and unable to handle new user requests. This can lead to performance issues and user frustration, as users may experience delays or be unable to log in to the system.
  Causes:
  
  High User Load: A sudden increase in the number of users or transactions can exhaust the available dialog work processes.
  Long-Running Transactions: Some transactions may take a long time to complete, holding onto work processes and preventing new requests from being processed.
  Configuration Issues: The number of dialog work processes may be set too low in the system configuration.
  Resource Bottlenecks: Insufficient system resources (CPU, memory) can lead to slow processing times, causing work processes to be occupied longer than expected.
  Background Jobs: If there are many background jobs running, they may consume resources that could otherwise be allocated to dialog processes.
  
  Solutions:
  
  
  Increase Dialog Work Processes:
  
  You can increase the number of dialog work processes in the SAP system profile parameters. This is done in the instance profile (usually DEFAULT.PFL or a specific instance profile).
  Use transaction RZ10 to modify the profile parameters. Look for the parameter rdisp/wp_no_dia and increase its value.
  
  
  
  Monitor and Optimize Long-Running Transactions:
  
  Use transaction SM66 (Global Work Process Overview) to monitor the status of work processes and identify any long-running transactions.
  Investigate and optimize these transactions to reduce their execution time.
  
  
  
  Check System Resources:
  
  Use transaction ST06 to monitor system performance and resource usage (CPU, memory, etc.).
  If resources are constrained, consider upgrading hardware or optimizing the system configuration.
  
  
  
  Review Background Jobs:
  
  Use transaction SM37 to check for background jobs that may be consuming excessive resources.
  Schedule background jobs during off-peak hours to reduce the load during peak times.
  
  
  
  Load Balancing:
  
  If you have multiple application servers, ensure that the load is balanced across them. This can help distribute user requests more evenly.
  
  
  
  Restart the Instance:
  
  As a last resort, if the system is unresponsive, you may need to restart the SAP instance. However, this should be done with caution and typically during a maintenance window.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM66: Global Work Process Overview
  SM37: Job Monitoring
  ST06: Operating System Monitor
  RZ10: Profile Parameter Maintenance
  
  
  
  SAP Notes: Check SAP Notes for any specific recommendations or patches related to this error message. You can search for relevant notes in the SAP Support Portal.
  
  
  Documentation: Refer to SAP documentation for detailed information on configuring work processes and performance tuning.
  
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the occurrence of the "No free dialog work process available" error and improve the overall performance of your SAP system.