How To Fix WRF_REF427 - As maximum number of usable dialog tasks &1 was entered!

SAP Error Message - Details

• Message type: E = Error

• Message class: WRF_REF - Messages from References for Materials Without History

• Message number: 427

• Message text: As maximum number of usable dialog tasks &1 was entered!

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 WRF_REF427 - As maximum number of usable dialog tasks &1 was entered! ?

  The SAP error message WRF_REF427 indicates that the maximum number of usable dialog tasks has been reached. This error typically occurs in the context of SAP's Retail module, particularly when dealing with the configuration of dialog tasks for users or sessions.
  Cause:
  The error is triggered when the number of dialog tasks (which are essentially user sessions) that can be utilized has reached its limit. This limit is defined in the system configuration and can be influenced by various factors, including:
  
  System Configuration: The maximum number of dialog work processes configured in the SAP system.
  User Sessions: The number of active sessions a user is trying to open exceeds the allowed limit.
  Resource Constraints: The system may be under heavy load, leading to a temporary inability to allocate additional dialog tasks.
  
  Solution:
  To resolve the WRF_REF427 error, you can consider the following steps:
  
  
  Check System Configuration:
  
  Review the configuration of dialog work processes in the SAP system. You can do this by accessing transaction RZ10 or RZ03 to check the instance profile settings.
  Look for parameters like rdisp/wp_no_dia which defines the number of dialog work processes.
  
  
  
  Increase Dialog Work Processes:
  
  If the current configuration is insufficient, you may need to increase the number of dialog work processes. This requires administrative access and should be done with caution, considering the overall system performance and resource availability.
  
  
  
  User Session Management:
  
  Ensure that users are not exceeding the maximum number of allowed sessions. You can check the active sessions for users using transaction SM04 or AL08.
  Encourage users to log off from sessions that are no longer needed.
  
  
  
  Monitor System Performance:
  
  Use transaction ST02 (Buffer Monitor) and ST03N (Workload Analysis) to monitor system performance and identify any bottlenecks that may be affecting dialog task availability.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may provide additional insights or patches related to this error.
  
  
  
  Restart the Application Server:
  
  In some cases, restarting the application server may help clear up any temporary issues that are causing the dialog task limit to be reached.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for detailed information on configuring dialog work processes and managing user sessions.
  SAP Community: Engage with the SAP Community forums for discussions and solutions shared by other users who may have encountered similar issues.
  Performance Tuning: Consider performance tuning of the SAP system to ensure optimal resource allocation and management.
  
  By following these steps, you should be able to address the WRF_REF427 error and improve the management of dialog tasks in your SAP environment.