How To Fix 5D798 - The combination of these special rules is not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: 5D - Error Messages for German Infotype Module Pools

• Message number: 798

• Message text: The combination of these special rules is not allowed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message 5D798 - The combination of these special rules is not allowed ?

  The SAP error message 5D798, which states "The combination of these special rules is not allowed," typically occurs in the context of configuration or master data settings within SAP, particularly in modules like SAP Sales and Distribution (SD) or SAP Material Management (MM). This error indicates that there is a conflict in the special rules or settings that have been defined for a particular transaction or configuration.
  Causes:
  
  Incompatible Configuration: The error often arises when there are conflicting settings in the configuration of special rules, such as pricing, discounts, or tax calculations.
  Master Data Issues: There may be inconsistencies or conflicts in the master data, such as customer or material master records that do not align with the defined rules.
  Custom Code or Enhancements: If there are custom developments or enhancements in the system, they may inadvertently conflict with standard SAP rules.
  Missing or Incorrect Settings: Certain required settings may be missing or incorrectly configured, leading to the error when trying to process a transaction.
  
  Solutions:
  
  Review Configuration Settings: Check the configuration settings related to the special rules in the relevant module (e.g., pricing procedures, tax determination, etc.). Ensure that there are no conflicting rules.
  Check Master Data: Verify the master data for the relevant customer, material, or vendor. Ensure that all necessary fields are filled out correctly and that there are no inconsistencies.
  Analyze Custom Code: If there are any custom developments, review the code to ensure it does not conflict with standard SAP functionality. Debugging may be necessary to identify the source of the conflict.
  Consult Documentation: Refer to SAP documentation or notes related to the specific error message. SAP Notes may provide insights or patches that address known issues.
  Testing: After making changes, conduct thorough testing to ensure that the error does not recur and that the system behaves as expected.
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide guidance on configuration.
  Transaction Codes: Familiarize yourself with transaction codes related to configuration (e.g., SPRO for configuration settings) and master data maintenance (e.g., XD01 for customer master).
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  If the issue persists after following these steps, it may be beneficial to consult with an SAP expert or your organization's SAP support team for further assistance.