How To Fix CN093 - Unit costing is only possible for primary cost activities

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 093

• Message text: Unit costing is only possible for primary cost activities

Self-Explanatory Message

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• What is the cause and solution for SAP error message CN093 - Unit costing is only possible for primary cost activities ?

  The SAP error message CN093, which states "Unit costing is only possible for primary cost activities," typically occurs in the context of cost planning and controlling within SAP, particularly when dealing with cost centers, internal orders, or project systems.
  Cause:
  This error arises when you attempt to perform unit costing on a secondary cost activity. In SAP, cost activities are categorized into two types:
  
  Primary Cost Activities: These are costs that are directly related to the production of goods or services, such as labor, materials, and overheads. They are posted directly to cost centers or internal orders.
  Secondary Cost Activities: These are costs that are allocated from one cost center to another, such as internal allocations or assessments. They do not represent direct costs incurred but rather the distribution of costs.
  
  Unit costing is only applicable to primary cost activities because it involves calculating the cost per unit of output, which is not relevant for secondary costs.
  Solution:
  To resolve the CN093 error, you should ensure that you are only attempting to perform unit costing on primary cost activities. Here are some steps you can take:
  
  
  Check Activity Type: Verify that the activity type you are trying to use for unit costing is defined as a primary cost activity in your configuration. You can do this by navigating to the activity type settings in the controlling area.
  
  
  Adjust Cost Planning: If you are trying to plan costs for a secondary activity, consider adjusting your planning approach. You may need to use different methods for secondary cost activities, such as assessments or distributions, rather than unit costing.
  
  
  Review Configuration: Ensure that your controlling area and cost center settings are correctly configured to allow for unit costing on the appropriate activities.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for more detailed guidance on cost planning and the specific requirements for unit costing.
  
  
  Seek Help from SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support or your internal SAP team for assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as KP06 (Cost Center Planning) or KSU5 (Activity Type Planning) to manage your cost planning effectively.
  Cost Element Types: Understand the difference between primary and secondary cost elements in SAP, as this will help you navigate cost planning more effectively.
  SAP Notes: Check for any SAP Notes related to error CN093 for additional insights or patches that may address the issue.
  
  By following these steps and understanding the underlying concepts, you should be able to resolve the CN093 error and proceed with your cost planning activities in SAP.