How To Fix WRF_REF000 - Specify server group for parallel processing

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 000

• Message text: Specify server group for parallel processing

What causes this issue?

You want to start parallel processing, but the system needs a server
group.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Enter the server group for parallel processing in the corresponding
field of the selection screen.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WRF_REF000 - Specify server group for parallel processing ?

  The SAP error message WRF_REF000 ("Specify server group for parallel processing") typically occurs in the context of SAP's Advanced Planning and Optimization (APO) module, particularly when dealing with parallel processing of tasks. This error indicates that the system requires a server group to be defined for executing certain processes in parallel, but it has not been specified.
  Cause:
  
  Missing Server Group Configuration: The server group that is needed for parallel processing has not been defined in the system.
  Incorrect Settings: The settings for the parallel processing might be incorrectly configured, leading to the system not being able to identify the appropriate server group.
  Transaction or Process Context: The error may arise in specific transactions or processes where parallel processing is expected but not properly set up.
  
  Solution:
  To resolve the WRF_REF000 error, you can follow these steps:
  
  
  Define a Server Group:
  
  Go to the transaction code RZ12 (or RZ10 for profile parameters) to define or check the server group settings.
  Ensure that a valid server group is created and configured for the relevant application.
  
  
  
  Check Parallel Processing Settings:
  
  Navigate to the relevant configuration settings in the SAP APO system.
  Ensure that the parallel processing options are correctly set up, including the assignment of a server group.
  
  
  
  Transaction-Specific Settings:
  
  If the error occurs in a specific transaction, check the transaction settings to ensure that the server group is specified.
  For example, in the context of planning runs, ensure that the server group is defined in the planning run settings.
  
  
  
  Consult Documentation:
  
  Review the SAP documentation or help files related to the specific transaction or process you are working with to ensure all necessary configurations are in place.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the configurations, consider reaching out to SAP support for further assistance. They may provide insights specific to your system version or configuration.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RZ12, RZ10, and any specific APO-related transactions that may be involved in your process.
  SAP Notes: Check for any SAP Notes related to the error message or the specific transaction you are working with. SAP Notes often contain patches or additional configuration steps that can resolve known issues.
  System Logs: Review system logs (using transaction SLG1) for any additional error messages or warnings that may provide more context about the issue.
  
  By following these steps, you should be able to resolve the WRF_REF000 error and ensure that your SAP system is configured correctly for parallel processing.