How To Fix KU398 - This combination of characteristics is not permitted

SAP Error Message - Details

• Message type: E = Error

• Message class: KU - Costing: Rollup

• Message number: 398

• Message text: This combination of characteristics is not permitted

What causes this issue?

You have selected "product group" as the characteristic for the product
drilldown. This characteristic is determined through the plant and the
material. This means that you must select both of these
characteristics.

System Response

The system does not accept the characteristic "Product Group" alone.

How to fix this error?

Either remove "product group" from the list of characteristic or select
both "Plant" and "Material" in the list of characteristics.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KU398 - This combination of characteristics is not permitted ?

  The SAP error message KU398, which states "This combination of characteristics is not permitted," typically occurs in the context of variant configuration (VC) in SAP. This error indicates that the specific combination of characteristics selected for a configurable material is not valid according to the configuration settings defined in the system.
  Causes:
  
  
  Invalid Characteristic Combinations: The selected characteristics may not be allowed to coexist based on the configuration settings. For example, if you have a characteristic for color and another for size, certain combinations may be restricted.
  
  
  Dependencies: There may be dependencies defined in the configuration profile that restrict certain combinations of characteristics. These dependencies can be either preconditions or selection conditions that must be met.
  
  
  Missing Values: Sometimes, the error can occur if required characteristics are not filled in or if there are missing values that are necessary for the configuration.
  
  
  Configuration Profile Issues: The configuration profile for the material may not be set up correctly, leading to invalid combinations being allowed.
  
  
  Solutions:
  
  
  Review Characteristic Combinations: Check the characteristics and their allowed combinations in the configuration profile. Ensure that the selected characteristics are valid together.
  
  
  Check Dependencies: Review the dependencies defined for the configurable material. Make sure that the selected characteristics meet all the conditions specified in the dependencies.
  
  
  Validate Configuration Profile: Ensure that the configuration profile for the material is correctly set up. You may need to adjust the settings or add missing characteristics.
  
  
  Use the Configuration Simulation: Use the configuration simulation tool in SAP to test different combinations of characteristics. This can help identify which specific combination is causing the error.
  
  
  Consult Documentation: Refer to the SAP documentation or help files related to variant configuration for more detailed information on setting up characteristics and dependencies.
  
  
  Seek Help from SAP Support: If the issue persists, consider reaching out to SAP support or your internal SAP team for assistance. They may be able to provide insights based on the specific configuration of your system.
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CU01 (Create Configuration Profile), CU02 (Change Configuration Profile), and CU03 (Display Configuration Profile) to manage configuration settings.
  Characteristic Values: Ensure that the characteristic values are correctly defined and that there are no conflicts in the value assignments.
  Testing: Always test changes in a development or quality assurance environment before applying them to production to avoid disruptions.
  
  By following these steps, you should be able to identify and resolve the cause of the KU398 error in SAP.