How To Fix RP798 - This combination of special rules is not permissible

SAP Error Message - Details

• Message type: E = Error

• Message class: RP - Error Messages for Infotype Module Pools

• Message number: 798

• Message text: This combination of special rules is not permissible

Self-Explanatory Message

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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 RP798 - This combination of special rules is not permissible ?

  The SAP error message RP798, which states "This combination of special rules is not permissible," typically occurs in the context of payroll processing within the SAP system. This error is related to the configuration of payroll rules and the way they interact with each other.
  Cause:
  The error usually arises due to one of the following reasons:
  
  
  Incompatible Payroll Rules: The payroll rules defined in the system may have been set up in a way that they cannot coexist. For example, certain rules may conflict with others based on the conditions or parameters defined.
  
  
  Incorrect Configuration: There may be an issue with the configuration of the payroll schema or the rules themselves. This could include incorrect settings in the payroll processing logic.
  
  
  Data Issues: There might be inconsistencies or errors in the employee master data or payroll results that lead to this conflict.
  
  
  Custom Rules: If custom payroll rules have been implemented, they may not be properly integrated with standard rules, leading to conflicts.
  
  
  Solution:
  To resolve the RP798 error, you can take the following steps:
  
  
  Review Payroll Configuration: Check the configuration of the payroll schema and the specific rules that are being applied. Ensure that the rules are compatible and correctly set up.
  
  
  Analyze the Rules: Identify the specific rules that are causing the conflict. You can do this by reviewing the payroll log or using transaction codes like PE02 (to view and edit payroll schemas) and PE04 (to view and edit payroll rules).
  
  
  Check Employee Data: Verify the employee master data and payroll results for any inconsistencies that might be causing the issue. Ensure that all necessary fields are populated correctly.
  
  
  Test Changes: After making any changes to the configuration or rules, run a test payroll to see if the error persists.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to payroll processing for any specific guidance on the rules in question.
  
  
  Seek Expert Help: If the issue persists, consider reaching out to an SAP consultant or support for further assistance, especially if custom rules are involved.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as PE02, PE04, and PC00_MXX_CALC (where XX is the country code) for payroll processing.
  SAP Notes: Check SAP Notes for any known issues or patches related to the RP798 error.
  Testing Environment: If possible, replicate the issue in a testing environment to avoid impacting live payroll processing while troubleshooting.
  
  By following these steps, you should be able to identify and resolve the cause of the RP798 error in your SAP payroll processing.